Because they are willing to serve and capable of doing the job. Don't dishonor her sacrifice by turning this into a no-women-in-the-military thread.
IMO, there is not the least shred of disrespect for her sacrifice in saying that women should not be in combat roles.
A man's foremost duty is to protect the women and the children. That's the way the Good Lord made us, and I'm not afraid to say it.