I'm guessing a 30 year old service member is far less likely to be in an active combat role (special forces aside) and more likely to be doing administration, leadership, teaching, logistics, etc.

You know, roles where keeping a cool head is especially important.

Testosterone production drops quite significantly over time. We generally accept hormonal therapy for women often for a majority of their life; it’s not necessarily something to condemn. However, it’s not really well developed (shots every few weeks makes the testosterone level ridiculously high for a while and then drop to pretty low levels as the date for the next dose approaches) and there’s a really good chance they’ll overprescribe on the “manly drugs”. There’s a good number of side effects, including being a dumb-dumb, as Pete demonstrated.

Exogenous testosterone does (often permanently) drop natural production. If they’re signing up for a lifetime of free TRT, it’s probably not really a concern. I somehow doubt that they will, and suspect that the low T is “not service related as there was a demonstrable low T level 10 years ago.”