But then, that's mostly only true for traditional fuzz circuits. I have a TC Magus Pro which could get pretty close to fuzzy territory (ok, it's not as "gnarly"), which reacts incredibly well to playing dynamics and volume pot settings in a buffered environment, possibly even better than unbuffered. Same goes for HX ecosystem's Top Secret OD, which can as well cover some kinda fuzzy ground and cleans up very well.
And fwiw, if there was input volume as a modifier source (even better if there was a kind of "frequency follower" - but that might be too much to ask), you could basically tweak each and every dynamic interaction exactly the way you wanted. Which is why I would like to see modifiers added.