But if you think about it back in like medieval times, they would where armour somewhat similiar to that ALL the time. And wearing that after a couple years, their bodies actually became a lot bigger and are able to support all of that. Just think that back then, this guys neck would eventually become huge and he would probably be able to fight with it on.
Have you ever really looked at ancient armor? Sure, there was some some baroque stuff, but that was usually court armor, worn by fops after the rise of firearms. Who do you think designed armor back in the day, Lamarck?