If it had no sort of player-choice-driven character development at all beyond the initial character creation, I'm not convinced anyone would buy it being "an rpg".
As I mentioned, I can think of a number of games that allow you to do this, but I can't think of any that most people would be willing to qualify as RPGs.
Even if it's not
mechanical leveling and progression, there's gotta be
something, or you're gonna have trouble convincing people you belong in the RPG genre, as far as I can tell. Counter-examples welcome.
Also, Sinistar,
I'd like to think that character creation should be significant part in away so that YOU, the player, would feel connected to that character and pretend to be him/her/it. And so you role-play that character.
In my experience, it's the exact opposite for many people. Creating a character... removes them from the world, in a way. They aren't taking on a role that already exists in a world, with connections and immersive potential, they are pushing some idealized version of themselves into this alien world.
The TES games have always
intentionally been about that, of course - it's part of their narrative, that you're the unnamed outsider entering this alien world, and building a character from scratch reinforces that - it breaks you
out of the roleplaying and makes the game, intentionally, more sandboxy, by giving you more freedom to ignore your role completely. (See: The number of people who never even bother to complete the main quest, or who ignore it for large chunks of the game)
While a game like Planescape Torment gives you a lot of choices, and actually forces you to take on the role of the Nameless one. There's character customization, but it's not "be anyone you want!" but "express this role the way you see fit!" which seem, to me, two very different design choices.