A POW for president. Isn't it insaine?

McCain spent more than five years in Vietnam as a prisoner of war humiliated, kicked in the b..t, accepted doing dirty things to survive capture and was not sent back home till the war ended. I can not call him a war hero for being captured and I think he can not make a good president. Normally POWs never return back to the battle field due to the pressure put upon them during captivity that may affect their performance in the field. How do you think about that?