Female element in Prog Rock

Wait, I didn't say rock is bigger than classical commercially, I said it is not a marginal genre.  But Mozart anyway supports my argument.  His music has been taught by music pedagogues and celebrated over centuries which has built up a huge following in music circles for him.  Rolling Stones are far more recent historically. It will be impossible to judge because of changing cultural trends how Mozart would have fared in the 60s commercially.  But what we do know is that pop and rock have dominated the public's tastes for the better part of the last 40 years or so.

In the sense that it will never get the critical acclaim and academic appreciation of jazz or classical, yes.  In terms of commercial success or fan following, hardly.