I don't see how that follows. Most chess grandmasters are men; should women not play? If you accept the hypothesis that males have greater genetic variability than females, it shouldn't be surprising to see men overrepresented at the very top (and bottom) of just about everything.

And military requires more endurance that women normally have.

It also requires more endurance than most men have. But if an individual woman can legitimately meet that standard, why deny her the opportunity?