Gah this got sidetracked, and i feel like we're discussing two different things, so I'll leave the marth discussion alone after this post.
Keep in mind my argument was on Marth's fsmash only, and the argument was that the entire blade should act as a tipper, per the "no reason not to = should be auto" logic.
This has nothing to do with aerials, where the tip does affect knock back angle, or spacing, because the whole blade would act as a tipper.
Also saying that the weak hit should be removed does not imply that every attack should then be fsmash.
We are indeed discussing different things but on the same topic, and that is because I am trying to explain to you that tippers do not go into the "no reason not to measn should be auto" as you think it should.
Basically in order for there never to be a reason not to Tip F-Smash then that would mean that you should never actually execute a Non-Tipped F-Smash, even if you don't have enough time to space yourself . It also implies that there is no difference in the risk between performing an F-Smash at close range or performing it at Tip range and that the risk involved in throwing out an F-Smash is the same always, without taking into account positioning, your opponents positioning or his current action or state. What this means is that a pro player would never perform a single F-Smash that was not tipped, or in the same way they would never not perform an F-Smash as soon as they were in range to do it.
This in fact leads to every single pro Marth player performing F-Smash as soon as they were in tip range, without taking into account his other options or his opponents actions or options. Yet, this is not the situation. In a match there a many, many more options than tipping that F-Smash. Your opponent could be shielding, you could dash into a grab, you could jump into an F-Air, you could dash dance and bait a move out of him. No actual player will automatically and mechanical perform a F-Smash as soon as he is in tip range, which is what L-Cancel truly is.
Tip F-Smash does create options for the player, there are times when you are at Tip Range where you would rather do another move and thus there are times when it is better not to Tip F-Smash.
You seem to confuse the fact that it is always better to Tip an F-Smsash with the fact that this is not always an option or that there might be other options that are not Tipping it.
There are many times where a Tipped F-Smash is also not possible due to the decisions that you just made and a regular F-Smash is performed, yet by "Never Not Do It" logic, that player is an idiot and should have just instead not done anything, as performing a Non-Tipped F-Smash is never okay.
So to make it simpler. If it is literally impossible to space yourself, that is a reason not to perform Tip F-Smash. If the opponent is shielding, that is a reason not to perform the Tip F-Smash. If you can grab him into a chain combo (Spacies) or have another even better combo that is a reason not to Tip F-Smash.
There are many reasons not to perform a Tip F-Smash, there are also many more options available every time you can perform a Tip F-Smash and you are choosing to perform the Tip F-Smash over the other options. L-Cancelling has no options, no risks and no choice, it is an "always do" action, there is not a situation where you don't want to do it.
It is very different.