I would say that depends. If you talking some random insider on the net? OK. If you are talking about a well-known reporting with a good track record? Not so much. Often unless a reporter ALSO hears the same, they won't say anything unless they have direct knowledge as well. For example, Gambo said a bunch of stuff on radio first that nobody reported for days about the Suns. Why? Because nobody else could corroborate. Would it add credibility? Absolutely. However, that doesn't mean it has NONE.
Also, again. Do you have an example where a reporter was blatantly wrong and got a pass because it wasn't in writing?
I am with you. If it was just him speculating and discussing that is a totally different scenario.