Why is there so much opposition to any form of Universal healthcare?

It seems that there are a lot of people against providing affordable to all Americans but most of the arguments I have heard have made no sense to me.
It’s not partisanship either; I mean they literally do not make sense unless one assumes that the entire purpose of healthcare, insurance, and related industries is solely to make money and has absolutely nothing to do with actually making/keeping people healthy.
Could somebody please explain how one could be against Universal Healthcare on general principle?

(I can understand why some may be against specific proposals, but not the entire concept to the point where they shoot down every proposal.)