but if you do, you don't need to change it after the tutorial, because you already made the right one
You just don't want to understand do you? Saving before the second character creation would let people who don't want to play through the tutorial again have that option.
It doesn't erase the feature, but it's always been a little silly.
"Alright, now before you leave this area, are you sure you're a Breton? And are you sure that you have a beard? I'm just asking because, despite being a bearded Breton, you don't look sure about that."
I think the magic system of Skyrim is silly, Bethesda should scrap magic for TES VI.
Again. Some want the option, give it to them. It's a minor change, why not implement it? It won't hurt your experience, but enhances that of others. How is that silly?