Except that this feature didn't always exist, and if it did, it wasn't communicated well because I didn't find out about it until very recently when I switched to the software token from the hardware one I got back when it was first offered in XI.
Other games handle this in a much more efficient way. If you reset your phone, you have to remove the token and reattach it. Other games have a process to just recover the token to the new device that doesn't leave you vulnerable (I realize it's a very short time, but it's a vulnerability nonetheless).