doctorbadwolf
Heretic of The Seventh Circle
Now you're contorting yourselves just for the sake of argument.
Any "one hit kill" reality, where a gun doing 10% of your hit points is "mockery", is one where you need to look elsewhere than D&D. Yes, it really is that simple.
You dont, though. Again, you can just increase the damage. Like many genre games of dnd, you’d want new classes or at least subclasses, but that’s it. The damage values of weapons aren’t inextricably built into the engine.