Yes, they have data many don't have access to. And, they make "educated guesses" based on this data as well as the expertise available to them.

Their predictions may certainly be embellished as well. However, their statements can also be taken out of context or misinterpreted.

None of this is in question. The challenge is to make a careful judgment of your own.

Those estimates are sales messages, nothing more, and so are untrustworthy.

They make it up.