It's never been studied, I suppose. Or rather the purists think the magic comes from within, so skills with spellwork happens only due to talent, not hard work.

[Which, see her feathers get ruffled there.] Which is utterly [bullshit.] innacurate. It also keeps them in the impression of being somehow superior to the rest of us who don't come from parents who can trace their magical bloodline back for generations.