I dunno, I think I'd veto a backstory that included "I used to be in a relationship with a god" for a level 1 character

Fair, but I must say I quite like the "special-tadpoles in their brains reset them to level 1" reasoning for it in BG3.
Gale starts off failing at magic and getting stuck in a rock and Wyll jumps into a battle that 18 times out of 20 he loses if you don't intervene.
So they do kind of show how these characters are used to being better at what they do than they are at the start of the game and I like that.
Also finding out why they're special is part of the fun too.
"Why can't I travel with NORMAL people?!?"
:P
Every DnD player ever...
But in all seriousness, racewise the companion group is far too boring for a real life DnD group, but backstory wise, that is a totally valid DnD experience.
Lol and lol!