Maybe because the goal of feminism is to have more equally not to bolster the ranks of marginalised people with even more women.
Maybe if men wanted to have more women in these jobs they shouldn’t be so fucking hostile and sometimes dangerous to women.
Maybe if men hadn’t built a society with only men in mind, including when designing equipment, procedures, etc., for these jobs, maybe women had a better chance doing them?
The reason isn’t that they believe men are disposable. It is that they believe women are inferior. Just look at the comments in this topic.