If we compare near-professional dancers, then the question of showiness will be exclusively a matter of taste: the same Beyoncé or Lady Gaga dance on heels so that you will be blind. And yes, the wow-effect of the male dancers on stiletto heels is largely due to the slight dissonance - how is it, this is a man who looks masculine, and at the same time moves amazingly in emphatically feminine and very uncomfortable shoes! :)
It depends on how they dance. If you are talking about people like Janis Marshall, then maybe because it looks unusual and unusual. .