I pursued a health care service related career to avoid intense military training when the my country mandates some enlistment. It's least likely to happen but you just can't be sure nowadays when any nation threatens here and there with nukes. I wouldn't mind the physical strain of the job, I'd probably be hating the attitude superiors would display to command discipline and respect.

Though the training to equip guns and fight is nice, there's plenty of mental strength building just by being a health care provider. Fighters can kill while medics do the opposite.