I think a lot of sci-fi fans (myself included) don't pay much attention to that because, well, it's not why we read sci-fi. People are boring. Cool science and weird technologies and interplanetary-scale politics are fun. For every story you'd like to tell to make a character "deep", there's a whole genre dealing with it in real-world settings already. Troubled teenagers? Sure, there's a section on Amazon just for that. People in love? Every other book is about this. Etc.
I think a lot of sci-fi fans (myself included) don't pay much attention to that because, well, it's not why we read sci-fi. People are boring. Cool science and weird technologies and interplanetary-scale politics are fun. For every story you'd like to tell to make a character "deep", there's a whole genre dealing with it in real-world settings already. Troubled teenagers? Sure, there's a section on Amazon just for that. People in love? Every other book is about this. Etc.
Just my 2¢.