The SEC is a great example of how a team can do well in a P5 conference and not be selected. In most cases, team that do well in a P5 conference do so because they are actually good teams. It's not just that they're good relative to their conference.
What team in the SEC is going well that isn't going to get selected?
I think they're projected at 5 teams in? I think the PAC is a better argument maybe since they're only looking at 4 in their massive conference.
But lets not get too lost in singular team scenarios. Your using an example of a conference that didn't know they had basketball teams outside of Kentucky and Florida. Look at the Big 12, Big 10, Big East (p5 in basketball kinda?) , and ACC for better point evidence to my point.