That's why it is called speculation. Even if coming from reporters or 'pundits', it is often totally baseless regardless of whether the underlying rationale is logical.
Speak of attendance, I see official attendance of 15,068 in TB today. How many of those were Jays fans (yeah probably most games there with more than 10k is due to a boost from fans of the visiting team). It would be interesting to see how much difference a better stadium would have.