"Why aren't there more female bricklayers? Do the same impediments apply?"
I think this where the comment in the article applies about the need to run for a generation tilted in the opposite direction. Classic barriers that have been around for too long will be the main reason we don't see more female "bricklayers", we have to spend time getting rid of those barriers and then seeing how many women want to be bricklayers before we can truly say that women aren't interested in being bricklayers, that all takes time.
We've started along the path of trying to remove those barriers (I think some sectors of industry need to try harder or at least start), provide more opportunities and eventually we will be closer to a more balanced workforce at all levels in regards to gender.