A different way to look at this question is to ask why do certain roles have lopsided gender distributions. For, e.g. nursing, it can be explained by gender pre

A different way to look at this question is to ask why do certain roles have lopsided gender distributions. For, e.g. nursing, it can be explained by gender preferences towards human care roles. For leadership, there's elephant-in-the-room factors that explains higher rates of male leaders, i.e. perception of competence in patriarchal societies, the relationship between boys clubs and wealth as prerequisite for successful political campaigning, etc. If we were to control for these factors, we should be able to see representation rates that are 50/50 (or at least rates that are explainable by "morally acceptable" factors, e.g. rate of interest by gender)