Bill Zebub
“It’s probably Matt Mercer’s fault.”
I think it's important to remember that this is a question of how you approach the game, in terms of generating characters. While a lot of people seem to think that the default method is to have your character completely developed—in terms of identity, powers/abilities, and backstory—before you start making them, that wasn't always the expectation. You can also use a semi-randomized method of generating your character (e.g. using a combination of die rolls and prerequisites that have to be met) that lets you discover who they are as you're making them, one which dovetails with the idea that their backstory is the first several levels/sessions of play.
Personally, I think there's a lot to be said for that latter approach.
Sure, I love Traveller. But I think redesigning most TTRPGs (despite my aside about real gamers) is beyond the scope of the thread topic.