Why do some people recognize physical abuse but turn a blind eye to emotional abuse?

It's just one of the many things wrong with people . I'm afraid a lot need something to be made extremely obvious for them to acknowledge it( in this case physical abuse scars or what not) even then some will denial the facts. I've been thinking about this lately and have come to the conclusion that a lot of people don't bother to use their minds to think much especially if they have not been or are in a similar situation. It's hard to find considerate, thoughtful people who are able to see through the surface.