The argument among economists about the gender pay gap is, at root, an argument about relevance as well. Are women paid less because they take time off to have children or because of misogynist employers\’ irrelevant prejudices?
Amongst economists the argument is really about how much of the gender pay gap can be explained by each cause (and there are multiple others as well under discussion). I\’ve yet to come across even the most feminist of economists (Echidne of the snakes for example) who would argue that child bearing and rearing have no effect.
There might yet be arguments about whether this is fair, about whether society ought to be reorganised so as to change this, about teh relative importance of the different factors, but not about their existence.
It\’s, sadly, the non-economists who think it is either or.