This is true, but to be fair. there's 2 things preventing this
1. fear of invincible fart
2. lgl
neither are particularly end alls to the situation, mk can still avoid fart well. But he wants to keep grabbing that ledge to plank perfectly it's gonna eat ledge grabs quick.... if he's trying to save LGs so he doesn't go over, he's putting himself at risk. Most of mks options to avoid grabbing the ledge, but implying planking, such as glide and airdodging on stage can be farted, and since you are closer to the blast zone if you weren't in kill % yet, you definitely are now.
It's actually pretty easy to stall out farts as MK. In fact falling with Uairs from the edge covers most of Wario's options besides grabbing the edge, which is an ok option it just sucks balls that you're stuck with edge grab lag if he goes for an onstage option. MK on the edge in general is a guessing game for Wario, thank god you have a LGL but it's still gay.
MK beats out those options, but wario only needs a read to get in. To legit get fsmashes it will probably take a double read if the MK doesn't make a mistake, but lmao the risk reward for going for it is high enough that it's common to see wario's just go for it anyway. It's not That uncommon, because it happens commonly in almost all high level games between the two characters.
Reliability, and incredibly uncommon are different things. It's not something you can reliably fish for during a match, however it will happen through the course of the game if you let things take it's course.
Landing Fsmash vs MK? What's easier is shield grabbing bad spaced moves, Dtilt spam, or glide attacks. Fsmash is hard to use vs MK and usually is after trying to airdodge into MK's personal space. If he SH nairs and misses, then yeah go for it. Fsmash is just a rarity to connect with because on the ground it's easier and more feasible to punish with grabs in general speed and OOS wise, and punishing MK mistakes in the air is Uair Fart or the occasional other aerial. Fsmash being "bound to work" isn't a convincing point that he can handle it lol. I know what you mean, and it's common for small slip ups that allow the Fsmash super armor through a close Fair or the shuttle loop that gets shielding and *****. Stuff like that human wise is bound to happen, but it's obvious that Wario only has a shot at keeping the MU close through abnormal punishes. His actual tools compared to Diddy Falco IC's etc vs MK do not hold up. I'm just glad you aren't one of those 55:45 people cause I hate that with a passion WARIO IS NOT A GOD LADIES AND GENTLEMEN
Then apparently there are absolutely NO good metaknights among the top placers, except Maybe like anti but we will never know because doesn't enter more than 1 tournament per year.
If uair can hit you, and you decide to glide btw, you are definitely getting uaired or potentially farted. I literally already have to be in a situation you can't hit me from to start gliding safely. I don't know why people magically think gliding in front or above people is safe, it's a committed option with startup lag.
Tornado above Wario isn't that great (the height both of you are at obviously determines how good it is, being above Wario if he can't jump above or around you is fine or if you are gonna auto cancel it's usually fine), but the gliding part is true somewhat. Say you get Uthrow for example. A lot of MK players will just jump away, but use a loooot of jumps and feel pressured still when they could have done 1-2, glided away, and come back to the edge or stage.
Gliding immediately after a hit that sent you, say diagonally, is a big no no. If he Fthrows you and you decide to Jump/Glide instantly, STOP! horrible **** happens to you. Gliding vs Wario is achieving your goals horizontally, not vertically. Gliding threatens Wario from the side because he doesn't have great hitboxes to cover horizontally that also matches up with different GA timings or spacings. Gliding when there's a difference vertically is best for Wario because he can challenge it better and being above in a way that you can't easily steer the glide down or away from him makes that clap or fart imminent.
Uthrow does 10% and give's you potential for juggling as well.
I'm sure you know that but like lmao, it's something that people should do more, especially considering the fact that keeping fthrow fresh to kill at 150% near the ledge is a super useful tool.
Uthrow is overrated vs MK. Wario's throw game vs MK in general isn't that great because it tends to put things close to neutral, there's no Dthrow into OMG FALCO OPTIONS lol. Uthrow is fine if you have a hard read or if the MK is only going to jump/dair away, DI after low % also helps. Uthrow is better vs people like Marth. For MK I Fthrow him until it's stale and doing the same damage as Uthrow. Also depends on how much damage they already have. SUPER low % Uthrow is worth it.
and 
