What you describe, is a conscious choice. Not an obligation. You do not have to do it because it is not mandatory. .
I think it is preferable for it to be a choice, rather than have it forced upon you. But it's clearly a matter of preference - I usually have a clear idea about the character I want, and absolutely hate having choices made for me, or having choices taken away by random chance.
Other people like seeing what the dice give them and then building a character based on that.
I do have a new character I started playing that is a Halfling Sorcerer(wild mage)/Wizard(Diviner) - he has a talent for magic, but can't control it. (He was struck on the head as a child and has a mis-colored eye and shock of white hair as a result, and may also have some damage to the part of the brain that lets you cast spells.)
His family sent him to a wizard academy to learn control. It failed spectacularly. He partied and drank away the money his family sent him until they cut him off - he was expelled from the wizard academy soon after. He did eventually master a few basic spells and rituals in the battered and stained spellbook that is his only souvenir from wizard school (mage armor, shield, absorb elements), but it was long after he left.
His sorcerer magic is barely controlled at the best of times, and so far he really only knows a single spell - fire bolt. But his attempts to cast it often produce effects far different than what he intends - mispronouncing the spell so that it becomes "fire blot" (bonfire cantrip) instead. Or he uses way to much arcane power and the cantrip explodes into fire (burning hands) or manifests as a different element altogether (chromatic orb).
Between Tides of Chaos, Halfling Luck, Portent, and Wild Surges, incredibly improbable things tend to occur to or around him, as his magic unconsciously warps reality.
Last edited: