Thanks for your thoughtful comments, Ryan.
Yes, I think it’s perfectly reasonable to speculate about such matters. Sometimes speculation from one person can inspire someone else to conduct some scientific research on the issue. The speculation and the research don’t have to come from the same person or be presented at the same time.
And sometimes an article isn’t remotely intended to prove anything — pr even to convince anyone of anything. It’s just there to provide an interesting read and something to enjoy thinking about.