LOL!

I hear you simontemplar!  For those into realism in renders it certainly makes sense to have shoes that fit the action.

For myself, I justify the strangeness of having action heroes wearing heels and doing incredible feats (feets?) of balance, running, leaping, etc. by saying it's simply part of their super power / skill, and in the case of their improbably unbreakable (or silent) heels, that they're made of some equally fantastic polymer or alloy like something you'd see in the X-MEN.

I've thought of creating a whole superhero team:  Stiletto Corps!

LOL! ;)