I more or less agree with this. That's definitely the desired end game of the SEC and B1G, and if you consider all possible outcomes where the ACC remains a power conference at the end, a big chunk of them have Notre Dame joining.
From Notre Dame's perspective, it appears to behoove them to wait until the last possible moment to join a conference, so that they can see exactly how the dust settles and weigh their options as far as scheduling goes. But, if they wait too long, they couldNo end up on the wrong end of all the power and leverage.
It may also have something to do with whether they want the ACC to survive with FSU and Clemson in it, or without, as well. Perhaps they fancy an ACC that does not have FSU or Clemson and believe that by joining it and staying in it, they can keep it as a power conference that is then easier to win. They're not exactly moving the chess pieces around the board themselves, so much as predicting which pieces are going to move and when, and trying to decide when to stop the game and freeze the board the way they want it.