It’s so general as to be useless … basically what you are demonstrating here is one huge exercise in moving the goalposts, turning the theory into unrecognizable mush.

So “invent a necessarily preposterous myth” is out. It’s now just about some belief, doesn’t matter how it came to be or what it is. Can be true, can be false, can be anything.

If that’s the starting point then all the rest falls apart, really. It’s senseless.

You can talk about the role of signaling or whatever, but the connective tissue is missing and the entire interesting and potentially insightful part of the theory is missing.