Listen to this, OP:
Because those of us who do these jobs, and do them damned well (construction worker here) are fucking sick to death of the constant, low level attitude that we can’t / shouldn’t/ shouldn’t want to do the job. ... And THAT is why women often drop out or don’t progress beyond the training stage, the unrelenting pressure that you shouldn’t be there. Not that the job is physically Beyond us.*
Other good reason to be angry: we have children and want them to have a chance to choose a job that suits them as individuals without having to fight against the prejudice of other people.
100 years ago, the job I love, and am actually quite suited to, would have been out of my reach because it was just assumed that little lady brains couldn't cope with Latin manuscripts and certainly couldn't stand up to the pressure of academic debate.
65 years ago, my mother was shunted into a profession that she was unhappy in throughout her working life, because it was considered a suitable occupation for women. She could have done so much better for herself.
120 years ago, there was hardly any choice available at all for many people anyway- but funnily enough, those of my ancestors who were poor enough to have to do so did heavy physical work regardless of gender. Because survival. It killed my greatgrandfather. So male gender no protection there.