Sure, but presuming the deployed personnel are not Asexual, the problem still stands.

What problem? Non-asexual people can simply decide not to have sex, just like people decide to not eat sugar or meat.

It's not that simple, since sex is an instinct. It's hard-wired in our brains, not lile sugar or meat that are luxuries. But definitely possible with a ton of self-control.

That might be true for the average person, but since they only need a few candidates, it'd be pretty easy to select people with little or no sex drive. They are not very rare.

I don't believe truly asexual people exist the same way gay people do

I think they have depression, body issues, anxiety, etc but they don't have a true lack of sexual orientation