No one is saying they outright joined to change things, but clearly some things needed to be changed, and that is why Penske pressed on Ford to do more since he had that ability to jump ship with easy if they didn't. And look what came of it, a bigger use of the gen 2 rules than we've seen yet. Andretti then decided to press on GM and now a design study is supposedly being addressed for the Camaro. I imagine had they not joined, Tickford and DJR and T8 would have still been in the same boat they currently are with some okay with that and others saying "nothing we can do".
Volvo were successful because they actually paid their dues to be a powerhouse that could challenge the top teams from Ford and Holden. Had the investments that we now know Nissan did badly in gone over better, then perhaps they'd have shown more success rather than doing so now. We know Mercedes didn't do anything for Betty and that's why they struggled and their success with that car is because of Betty's team. So that's on those two manufactures, and VASC not holding them up to it, and the other two at the time being unwilling to see the playing field be balanced all played a part. The only reason I don't praise Volvo more is due to leaving somewhat high and dry GRM. However, I'm guessing they saw things they didn't really like in VASC and why they were adamant to leave once the contract was done.
I don't think the points you made are all part of the big picture, you have no basis to point to that the COTF has done anything to harm the series. If anything it brought in makes, it expanded to field, racing has still been good. And yet the same teams dominate the sports before and after the COTF. When teams, sponsors and again fans make a big fuss and cater to those blocking potential innovation, that could expand and help the sport grow into the future rather than diminish, that is the problem. You can't put that solely on VASC execs like your prior posts seemed to do.
Also
@Pete05 I had a follow up question to your "voodoo" trite. If KERS systems are voodoo, then do you believe Turbo technology is also voodoo?