I think most of us men don't have an issue with women who want to work in whatever area they want to with the obvious exceptions of jobs that the vast majority of women are a really bad fit.

After working in a few all male environments over the course of my career this is no longer the case for me. I don't care what field they work in so long as I don't have to work with them. All male work environments have proven to be more productive, more supportive both professionally and personally and to be perfectly frank they're more enjoyable. Women just destroy the dynamic that naturally emerges on a team of men. It's not even something they actively or maliciously do, the environment just doesn't take the same form when they are present.