I have a close friend who is an officer nearing twenty years. He has not had a tendency to criticize his job. However, he has been adamant that vaccines are incredibly important for the military and the policy changes have really angered him, specifically because of the damage it does to readiness.
I have habit of watching historical YouTube videos and so many times battles were lost or sieges were broken because one side got sick and could not keep fighting.
Only an ignorant who never studied history would voluntarily remove vaccination from army units.