Oh, ok. So you’re saying that changing tax systems would change the equilibrium, and some people might call that a harm. But that’s true of any major change, even if the new equilibrium is better for most people. It’s more of a fact about the _change_ than about what you changed to.
If you disagree, that's OK, but there's probably no way to make further progress in resolving that disagreement beyond a back-and-forth of "nuh-uh, yuh-huh".