It wasn't my intention to limit my comments on this to statements for which I have links to supporting academic studies. I wanted to propose my guesses, because it's fun to see who else has arrived at the same spot. I was careful to start with "I think it's" rather than "it is true that" or "consensus exists that".
Your "I think" described the conclusion. I didn't read it as describing your explanation for that conclusion, which you seemed much more confident about.