No, it's not. Please stop. You've been discrediting this person for 3 pages now and claiming they leached the leak from a Reddit post. When, in fact, that Reddit post never once mentioned that Hi-Fi Rush would be shadow-dropped during the Developer Event.
Now you're saying, "well, they could have easily guessed it."
How could anyone guess the release of a game that didn't even publicly exist before the Direct? How many times has it happened before?
This guy obviously knew inside information about a Zenimax game. It's possible they're making shit up about Starfield and Redfall, but it's also possible that they also have inside information about those Zenimax games.
At the moment, they have earned the benefit of the doubt because of their track record. Besides, other people like
are also corroborating the same information.