I think this kind of cause would be a lot more sympathetic if it focused more on the actual issues and less on "pay less attention to women's issues, here's the real problem". I don't think many people are indifferent to male issues, but they tend to be brought up as a reason for ignoring female issues rather than a problem in their own right.I don't think its a tragedy for women to get to the bottom of discrimination.
I do think that the obstacles facing adolescent and young adult males (and men generally) are given short shrift because we aren't as sympathetic in the current national narrative as women.
Case in point: this is a thread about feminism and here we are talking about how young men perform more poorly in schools.
There is this constant assumption (not necessarily by you, but in general) that improving the problems faced by one gender is always at the expense of the rest of the population, which is not necessarily the case. I think the school system could be improved for boys without harming girls, and I think the opportunities in senior management could be improved for women without making the system unfairly biased against men. And I don't think discussing feminist issues is incompatible with discussing male-specific issues (in fact there are many shared goals and overlapping ideals!), so long as each isn't being discussed as a way to shut down discussion of the other.