EzekielRaiden
Follower of the Way
It's not a matter of "ingrained," like you keep repeating.However, Level = Moar HP is so ingrained into what WotC D&D has become that it will not only never happen - Such a solution will not even occur to the designers or play testers...
This was literally their explicit design intent. They explicitly wanted HP growth (note how you always call it "bloat," in order to inject disdain for the concept right from the start, as opposed to a neutral word like "growth") to be the only remaining major demonstration of growing character power. You gain levels, and as a result, you cease to be scared of orcs and goblins; sure, they might hit you, but you can take a dozen such hits now no sweat. Thus you can actually have a dozen thrown at you and you're okay with that.
If someone says they want to remove the one thing the designers explicitly said was meant to represent character growth, it's not that big a leap to then ask "sooooo... what's going to replace that then? Because that's what the game was explicitly built to show advancement through." It's why BM Fighters get more extra attacks and bigger dice, but not better maneuvers, just more maneuvers.