"..social interaction is cultural and learned.." or may be, just may be we are genetically programmed to avoid things which starts uncomfortable thought proces

"..social interaction is cultural and learned.." or may be, just may be we are genetically programmed to avoid things which starts uncomfortable thought process. "They just don't automatically know what to do" This might not socially acceptable thing to say out loud, may be, people don't have _enough_ time or inclination to imagine other people's condition in everyday life. Like you remembered some cases where you looked away, there might be more cases where you didn't even notice that somebody disabled was around you.