Yeah, and then you have a party like mine, where three of the characters lost wives to various villains. Three. I prompted none of them to do this for their backstory. Out of 5 players, only one has any living relation.
Oddly, only the players with actual wives chose this for their character backstories... hmmm....
To add my two copper though. I like characters that have a strong reason to be following that main hook. Even if that reason is a hunger for riches or glory. Characters/players that are only invested because it is what there is to do, or because the rest of the party wants to do it is... not something that sounds fun.