True, but the fact so many big names are crediting the source indicate they have confidence in it. They probably don't want to look silly for reporting fake news if it's not true.
That's really not how news websites like that think.
They'd rather look silly for reporting fake news than look silly for not reporting the story at all. "So and so is reporting" doesn't express any confidence except exactly what it says -- if they had confidence in the story, that would mean they have a direct source.
How many times have you seen a headline saying that Ben Affleck is done as Batman? At least three or four since Justice League came out and as far as anyone with credibility can tell, he's still in it. A few weeks ago, they were all reporting that Henry Caville was out as Superman. That turned out to be a load of BS that was, at best, based on a misinterpretation of something a film exec said.