This is very true, a DnD character just can't be a nobody default since a level 1 character is already more powerful that the vast majority of the common folk. Even at that level, you have a background that explain why you can cast spells or handle weapons.
I would love for this background to be featured more in BG3, right now it barely matter what you chose except for a small bonus in checks and some rare dialogue when you pick Baldurian.
