Actually no, that reason is not obvious at all. I don't know of anyone who thinks that officially sanctioned, continued use of "Fighting Sioux" will ever be an option if a new name is not chosen. And fans will continue to wear their old Sioux jerseys long after a new name is chosen. Personally, I prefer not choosing a new name at all (or going with G and W) in the interest of not having to assume any more of a new identity than necessary, and I suspect many have that favor no name do so for the same reason.