The principle of charity doesn't protect you from saying stupid stuff, which you're doing. Stop bringing it up as if it makes the whole world wrong for disagreeing with your foolishness. You can't make broad blanket statements like you're doing without being wrong, because a single counterexample ruins the whole point. Some players are jackasses, others are stupid, and all of us have seen plenty of really crazy shit in fantasy which the system can't (and shouldn't) support, despite making as much narrative sense in its context as two-weapon fighting does in any context (it's not a good idea, at best you can get away with using an offhand weapon as an improvised shield of sorts).
Doing the impossible with no more effort nor explanation than failure to realize it's impossible, can't and shouldn't work in D&D. You can use unknowing reality warper as character flavor, sure, but you're still bound by the same rules as everyone else.
Achievements in Ignorance are non-starters, as they should be.
Power Born of Madness doesn't work either, and before you point out barbarian rage let me remind you that's not taking the limiter off, that's just temporarily using a different limiter, and it's a very small difference.
What about breaking mind control curses with the power of friendship? No extra Will save allowed, no end of duration in sight, but you just love 'em so hard, they're just so loyal, and your plea so impassioned, that they shrug off the magic and turn on their controller anyway. It's a fine idea, and a common one, but it's not supported. Nor should it be, there's no point even having mind control abilities if people can just ignore them whenever the hell they feel like it.
Consider physical attacks taken so far over the top that they act magical in nonsensical but somewhat believable ways. Striking things that don't tangibly exist or have physical structures to disrupt. Kazuma Kuwabara sticking his sword out of one dimension and into another to open an escape portal, for example, or Hulk punching a crack into an armor-shaped psionic wall of force. How well are these supported?
Can they be supported, without kicking the legs out from underneath other concepts?
How about the super likeable, super agreeable character? They're so adorable and sweet, no one would dare to hurt them. Mindless and ice-hearted foes seem to exist only to be melted by this individual. Even if something does threaten them, all they gotta do is hit 'em with the big eyes and the attacker just can't bring themselves to go through with it. Villains, golems, zombies, bears, trolls, dragons, demons... they're all just friends that don't know it yet. Of course they can always talk anyone into going along with what they want, and they make it look easy. Fanfic Mary Sues, cartoon toddlers, cats (especially kittens) for a lot of people, certain religious figures, etc, there are lots of folks that seem to enjoy and want to use this idea. How well is it supported in the RPG system? Even if you're willing to stoop to taking active measures like epic Diplomacy abuse instead of having it be a constant passive effect, that fails on anything immune to mind-affecting effects. Should it work in a RPG system?