Why not treat the action economy... like an economy?

[Harlock]

You may well be right, but I will continue to say that I think D&D should specifically not (try to) be a "realistic" game, because it never has been and striving for it has only ever made it worse at what it does well, IME. That is a major reason I drifted away from D&D around 1983 and only really came back to it with gusto in 2008, in fact.

I think that says everything it needs to. Thanks for being forthright.