Remathilis
Legend
The dragonborn fighter is more capable than a mundane earth human. He breathes fire, has resistance to it, and can even manifest wings from it. They are gifts from his ORIGIN, which is dragonborn, not his class.And yet a dragonborn fighter is expected to be no more capable than a 'mundane' earth human, even at max level, because the fighter is 'mundane'.
My point is that this standard of 'mundanity' is at odds with even the most baseline assumptions of most D&D worlds. We are already applying it unnecessarily.
So I'll turn the question back: how does the fighter class justify the ability to breathe fire, resist fire attacks and manifest wings? The dragonborn does it because he was made by Bahamut's blood and carries both a bit of divinity and draconic power in his lineage. Explain why fighters would get the same.
Because I am ALL ABOUT a dragonknight that has been touched by draconic power and can do all those things and more. That's hella cool. I'm not about Bob the farm boy turned soldier getting them because he killed enough goblins.