That seems like unnecessary complexity (and also doesn't match my own observations). You're replying here to a theory that it seems to me is sufficient on its o

That seems like unnecessary complexity (and also doesn't match my own observations). You're replying here to a theory that it seems to me is sufficient on its own to explain the phenomenon, unless you see some issue with it? I'm not certain the theory is correct but I think it's entirely plausible and more importantly I've yet to encounter a better one.