Chaosmancer
Legend
So...it's petty because it doesn't match what you want. But getting exactly what you want and denying other folks what they want, is not petty.
That's the crux of the entire argument. The insistence that your subjective preference is not subjective.
Some folks want all fighters to progress into being gods. Hercules, for one recent example that has been mentioned. Others do not want that, and think the status quo, which allows options for supernaturally enhanced fights and mundane ones, is working well. That's all this is, is a question of taste. Trying to prove to people that their taste is less logical than your taste...well, good luck with that.
Okay fine.
We will offer the new abilities only to Eldritch Knights, Psi Warriors, Rune Knights, Echo Knights, Samurai and Arcane Archers. Champion fighters, Battlemasters, Cavaliers, and Bannerets will be barred from getting these abilities. That way, only the magical classes can do extraordinary stuff, and everyone else can be objectively worse, just like you want. Because, these aren't replacing subclass abilities, these were meant to be added to the fighter directly.
I'm sure all these people who want mundane fighters will be perfectly happy being denied access to abilities until they decide to have access to supernatural powers, and players won't start taking the magical and supernatural subclasses who are just as good in combat but far superior out of combat since they just flat out get more abilities.