Because unlike most of the people here, I'm an actually competitive player who enters tournaments.
Unlike most of the users here, this effects me. Competitive Brawl already wasn't fun for me when it became the camping/stalling/running away battle that it was in competitive Brawl for much of 2009 and 2010. Melee with items isn't fun in a competitive setting, because it randomly changes results.
Now people are trying to ruin my fun with items=??? Yeah, no. That's not happening, even though I am better with items than your average competitive player.
The opinions of people who don't enter or host tournaments (or plan on doing so) doesn't matter on this. It doesn't effect them.
What the hell does that have to do with my analogy=??? You're literally turning my boxing analogy into an MMA analogy for no reason other than to "win" the argument.
No I'm not. I never once said that. Clearly you need help with reading comprehension if that's what you got out of that.
It's not a truly competitive environment because luck will win out on a fairly regular basis, instead of skill.
That's why items were banned in Melee after being legal in parts of the world for 2-5 years, and that's why in Brawl they are only legal in casual tournaments with minimal (if any) money or prestige on the line in regions where the level of play is fairly low.
Boxing is done in a ring. It is supposed to initiate action because the point of boxing is to win a match whether by stoppage or decision by doing more damage than your opponent did to you
If you put two boxers in an open field and randomly spawn items to where one boxer "wins" by blowing the other boxer up, is it still boxing=??? No.
Smashballs, Trophies, Pokéballs, Explosive Maximum Tomatoes, Heart Containers, Dragoons, Mega Mushrooms, Tiny Mushrooms, Warp Stars, Starmen, Metal Boxes, Bunny Hood, Super Spicy Curry, the Timer, the Electric thing, the Beam Sword, the Home-Run Bat, the Fan, the Star Rod, the Hammer, the Golden Hammer, the Super Scope, the Ray Gun, the Fire Flower, the Firecracker Launcher, Bomb-ombs, Star Fox Bombs, Deku Nuts, Freezemans, Pitfalls, and the EarthBound badge are all OP, and can potential either lead to way too early deaths, are OP kill setup moves, or can have insane combos.
Crates, Sanbags, Food, Lip's Stick, Motion Sensor Bombs, Gooey Bombs, the fire guys, Green Shells (what happened to red shells=???), Banana peels, bumpers, spring, that blue thing, soccer balls, team healer, and the Screw Attack all cause huge amounts of camping, stalling, and slower and less exciting matches. The flipper (it's in Melee, but not Brawl) does the same thing.
Mr. Saturn's are just annoying, and also does what the things I mentioned early do, but just to a lesser extent.
The Invisible Thing (it's an item in Melee, but not Brawl) also causes lots of camping and zoning, and just in slows down the match to a near halt.
The smoke ball thing literally does nothing but cause a distraction, as well as give Brawl framerate issues.
Heck, nearly all items cause frame rate issues.
Why not unban player caused frame rate issues=???
But to the point, the few items that aren't OP or cause huge gameplay annoyances at the top tier level.
The point of a match is to "play to win". If camping, stalling, or just in general anti-action based fighting gives you the best bet to win, people will do it, and they will win, and more people will copy them until it becomes the norm.
That sort of campy and stalling-heavy approach is what shot competitive Brawl in the foot (until the rules banned and punished that kind of play).
Every game has had a few characters get move changes. Veterans getting new moves nothing new.
You know what else isn't new=??? How items are almost universally OP, universally slow down matches, make competitive matches less fun (yes, fun is a factor) to compete in, and just in generally making everything less balanced, and make the mid tiers down unplayable.
That's not even mentioning how Sonic is faster than Project M Sonic, and how quickly he could get items, whereas slow moving characters like Jigglypuff, Link, and Ganondorf... are screwed (especially if they're all underpowered again like in Brawl).
And no, there won't be combo breakers as a mechanic. That type of mechanic doesn't work in smash, and is clearly not in the game. And if combo breakers are in the game, then the competitive scene won't last, because that will inevitably lead to a game that is overly reliant on counter-striking instead of actual fighting.
And even if there are such a thing, it won't stop Nana from getting items along with Popo, item throw combos with team characters (not just do we have Icies and Olimar plus his Pikmin, but Rosalina and her Luma now!), and characters like Mewtwo who grab their items with psychic powers and use them.
Well has the very premise of items changed=??? No it hasn't.
Items still randomly spawn, randomly favor one player or another, randomly become the most powerful thing on the stage, give an unfair advantage to fast characters (almost all top and high tier characters in each smash game are above average in movement speed), make the team characters broken, randomly cause players to have to camp and stall and run away if they truly want to do anything within the rules to win, and just create a scenario that isn't fun to play at a competitive level, and thus will inevitably lead in a huge falling out of the competitive community.
But hey, if you want that, more power to you, even though it won't happen because TO's want people to actually enjoy tournaments.
Lastly, the automatic bans are to make everything enjoyable and fair from day 1.
If something is banned is no longer-ban worthy, it is unbanned, including if items are balanced (which they aren't) and add depth (which they also won't).