Just to be clear, you think me saying that "in fantasy and mythology everyone in the team that would be PCs are equals or atlest real close, and the 'normal' people still do amazing superhuman impossible things" will somehow lead to not letting us upgrade fighter?
Yes. Do you want my evidence? Since DnD first came out near 50 years ago the idea has been that the team of PCs are at least close to equal, with normal people who can do amazing things, and we still have not been able to fix this disparity. Because we insist the fighter is "a normal man" and therefore we invite the Guy at the Gym fallacy all the time.
No one bats an eye at The Hulk smashing through a magical barrier of force with his bare fists, but a Barbarian can't do that, because the Barbarian is just "a normal man" with no special magical powers (and many people complain that the Barbarian even now has TOO MANY magical powers). If we drop the facade, and just admit that at a certain level, these people are not "normal men and women" then we can actually start matching feats from myth and legend.
For instance, why not have a fighter able to destroy stone with a dual-wielding maul and carve a tunnel through a mountain in a single day? John Henry did it, and while John Henry wasn't a normal man, he certainly was a heroic man.
I don't mind that. I have pushed for the last 5 years to have Ex and Sn powers in fighter. I just think that "I learned mountain hammer, or foe hammer, and now I can 1/encounter (short rest) ignore resitence with my attacks" is the bare bones bar is in hell minimum.
My problem with Ex and Sn is that it gets into a fundamental problem with DnD. Trying to define magic and "not-magic"
I think this was really highlighted a few years ago with the Sage Advice on why you can't counterspell dragon's breath. Is dragon's breath magical? Most certainly, but it isn't magical in a way that can be dispelled or counterspelled, because that only works on spells. The explanation of "background magical radiation" is a bit of handwavium, but it fundamentally works, because it acknowledges that a lot of stuff in Fantasy is just magical, and that magic is as natural as the air or the water.
Whether or not ignoring enemy resistance is magical or non-magical doesn't matter to me, you can do it, I don't need to try for this separation between the two forces, because then we are trying to define something that was never defined in the stories.
calling them super powers is what keeps being said over and over again stops them from happening... So when I point out Batman (and all his family of heroes) and Hawkeye and Green Arrow don't have super powers they just are 'that good' it's important.
But that narrative justification falls through. Which is a massive problem.