"Mindless Loyalty" What frigging planet was that poster on???
Service members come from every walk of life and join for a multitude of reasons. Mindless loyalty may be the very last reason to join. Perhaps the servicemember thinks there is something wrong with the service and wants to put a better face on the mission, or do rescue or humanitarian work. Some join the Coast Guard to get involved with environmental compliance (as my kid wanted to, but probably won't, meaning to say the USCG is probably not the branch).
Mindless, that's a very disrespectful term to describe people who set aside years of their lives to serve their country. My kid's doing it for additional college money, for art school. Hardly a mindless killer.