Why do new races start at 1 instead of 58?

That’s not consistent with their reasoning for the boost, though. The boost is for new players that wanted to play in TBC but didn’t play in Classic.

Wouldn’t Blood Elves and Draenei be a big draw for new players?

But wait… Blizzard said this:

So you’re not boosting past TBC content. It starts at level 58!