Here’s the thing. Men are already separatists. (So really we have no choice.)
Men already exclude women from anything, everything, important. (Any inclusion is tokenism: a false symbol, a PR move.)
Men already refuse to get involved with ‘women’s issues’, whether personal or political. That feminism itself is considered a special interest thing indicates that. (It shouldn’t be. And it wouldn’t be if ‘women’s issues’ were typically included in ‘issues’. That we have to establish them as ‘add-ons’ proves that ‘issues’ are really ‘men’s issues’. See? Separatism.)