Should employers in these fields be forced to hire men for equal wages despite their inferior capabilities?
No, Atlas. If employers were forced to pay equal wages to the men, it would be a disservice to them. It would make it almost impossible for men to find work.
If employers were then forced to hire an equal number of men and women, it would be a disservice to the men. It would make it almost impossible for men to achieve promotion.
If employers were then forced to promote an equal number of men and women, it would be a disservice to society. The most successful businesses would be those who skirted around the gray areas of the legislation, rather than those who are the best at what they do.
Employment, and business in general, should always be about mutually-beneficial voluntary exchange. The most-free business environment is the worker's protection, because any worker that is being exploited is allowed to become an employer instead. Every extra business regulation adds more friction to those who wish to enter the field, yet adds relatively less friction to those already in the field who are exploiting the protection against new entrants that is given to them by the regulation.