They give you the option of that in the origin characters. El Generico is the 6th choice without a fixed backstory other than race, class, background and whatever traits you decide in their responses (kind, greedy, etc). They cant make a game that takes your background of a polymorphed awakened shrub or whatever random thing you decided was your backstory.
Would 10 seconds of a random innkeeper asking you to kill a pesky giant rat in the pre-prologue satisfy you? Que the next person to gripe that THEIR character is a beekeeper from Chult who has never even been to Baldurs Gate...
No one is talking about you coming up with your headcanon backstory and having it acknowledged in game. Pre-fab responses as you said in another response is 10x better then what we have currently.
