As long as they can meet the same physical requirements as the men, sure.
This is not what is happening though, standards are constantly being dropped in the military, among police, and firefighters to allow for women to come in.
The two "first female army rangers" who just got headlines only did so because the standards were dropped to allow them to pass.
When ISIS captures our slower, weaker, weighed-down female soldiers and starts using them as baby factories and selling them into sex slavery, well, be careful what you wished for.
