There is only one championship. In the SEC there is only one title. The other 13 teams are at a disadvantage.
That said, they are give a ton of money and support to those 13 programs. Asking for a winning record over power 5 conferences isn’t asking much ( we don’t have that over the last 3 years). Auburn wanting better than 7-5 when you play 3 give me games every year isn’t asking for much either.