>>player character creator is determined by randomized dice rolling
3d6 in order is a test of the player's creativity in and ability to be a roleplayer.
broadly generalizing, people that refuse to do this in favor of pet characters are playing self-inserts and/or wish-fulfillment/power fantasy characters. this is especially prevalent in people with moderate to severe psychological issues (and almost always sexual) such as feminists, furries and troons.