Why is it that we require quotas for jobs in STEM fields but not in hard labour jobs like garbage collection or oil field work?

All I hear is that we “need” more women in male dominated fields yet they stop complaining as soon as the work becomes physically demanding?

And if they are all for equality why don’t we hear “we need more male nurses and cleaners!”

It’s probably because men are disposable and if we die on the job it’s just par for the course.