It is clearly not the case that identifying yourself as part of a group of people based on one characteristic is a complete waste of time on the basis that you are all individuals with disparate lives and looking at things collectively just creates stereotypes.
If it were the case, there would be no point having a national government making national policies on anything. After all, I don't have something in common with every other person in the UK because I am an individual, and I share some qualities that are more French. If people start making national policies that apply to British people as a group, this will only encourage others to view me as an eccentric binge drinking football hooligan who drinks tea and eats cake all day.
You can't have your cake and eat it. You can't want policies that sort things out for British people and expect people not to assume you are a football hooligan.
Childcare is a feminist issue. It is mainly done by women. The fact that it is also an issue for other people means they should also campaign about it.
I am, however, totally opposed to turning it into a parental issue with additional rights for parents. There should be an allotted amount of childcare leave per child not per parent, and whoever looks after the child (often a female lone parent) should be able to transfer that as she sees fit. So if a woman is sick and cannot look after her child, she should be able to transfer her leave to any other worker be they her friend, brother, grandparent etc. Otherwise you are pushing women back into a heteronormative model where she is assumed to be raising a child in a two parent family with a committed father. This already exists in some countries.
Apart from that, if I am looking at how to get more women into a certain profession, I want to look at the factors that keep women out of the workplace or from getting promoted - childcare is a major factor that I would want to think about there. What is going on with men and their childcare is irrelevant to looking at the range of different issues that interact only together for women - stereotypes, biological sex etc together, so that I can change the situation for women.