There's an entire thread here full of examples of what I'm talking about. You can use the Book of Nine Swords maneuvers as some examples, if you wish.
It sounds to me like you're trying to be dismissive and snide, again, rather than actually bothering to form coherent arguments.
There are two layers here - the one I'm talking about is the "fiat" layer. These are things your character can do, with known and set effects, regardless of the DM's approval. This is something like, "I hit it with my sword," or "I cast Fireball." The methods of causing these events to happen and the results of them are basically set, and managed by the rules of the game. If you say, "I cast Fireball," there's minimal interpretation necessary - you have the spell prepared, you cast it, a ball of fire explodes where you're pointing. You the player know your character is capable of doing these things because that's what they're good at. The default assumption is that these things happen.
The second layer is a more narrative interplay between players and DM where the player suggests actions and the DM interprets how best to assign difficulties, effects, results, etc. The player has minimal fiat here beyond, "I am trying to..." There is no default assumption here as to what happens, and the chances of success might be unknown; it's based mostly on the DM's interpretations of the rules, the situation, etc.
Nobody is suggesting that this second, more traditional layer needs to go or has no place in D&D. I'm suggesting that the fiat layer needs work; my suggestion is to improve martial characters' fiat, but I'm likewise pretty okay with reducing spellcasters' fiat.
Good. Neither do I. I also don't want their sole job to be carving through HP tofu.
-O
Not all, but you are the one throwing around the whole "mother may I" phrase. If you aren't worried about the DM then you can be rest assured that he/she will rule fairly by letting you do something when It's with in reason or it makes sense and no when it doesn't.