As for one of your alleged myths, ND is independent for the money isn't one, at least not in the last 25 years. Not sure where you came up with that one.
One of the reasons ND linked up with ACC is due to a legitimate problem in football scheduling. ND was having major issues filling a 12 game schedule. THAT isn't a myth
The issue isn't that a being in a conference would preclude teams from playing ND as opposed to the notion that nobody would have any reason to play ND.
In the current system, playing a strong OOC team helps a team's chances in a subjective selection process. i.e., a bunch of folks get in a room and decide who gets in based on their opinion! Teams currently have a reason to play a good OOC schedule. And having ACC having ND playing 5 games certainly helps the ACC which is the main reason the ACC agreed to the "pseudo" football membership to ND.
In a super conference world, getting in a playoff would likely be more objective, i.e., you finish 1st/ 2nd/3rd in your conference after playing conference 10 games and you are in. Think of the NFL playoff process. Anyone playing OOC teams want easy warm up games because the notion of SOS would become mute. Nobody has any reason to play strong OOC teams.