You don't need the extra strength if the muscle is already capable of stabilising what it needs to. Put it this way: I've never heard a powerlifter say they need to work on their calves so they can go further with their dead/squat/bench. It's not a limiting factor in the scheme of things. They are not muscles that need to be big for anything other than a desired appearance, which as we both agree is difficult to achieve. I would focus on a ton of other things (like basics) before devoting time towards calves like a bodybuilder
I think calling quads the most powerful muscles in the lower body is twisting the analogy to suit...if we are comparing legs to arms like I did when I said calves are like forearms, it should be said that the most powerful muscles in the legs (not lower body) are quads, whilst the most powerful muscles in the arms (not upper body) are triceps. Incidentally, both produce a push motion vs the biceps and hamstring which are their pull counterparts.