As to Charlie's credibility, I have not read his stuff, so I can't comment to his record specifically. But I will say that claiming he isn't credible simply because his record isn't 100% or that he earns a living through the subscription fees to read his full stories, is wrong-headed. If you get in the business of making predictions, you're gonna be wrong eventually, that is why most news sources avoid it. This leads to the fact that if you're writings are critical of the very people you're writing about, your reliance on their money for advertising. His actual record, and any bias therein, is completely fair game.
As to the statement and SEC implications, that is a red herring. Look at the Tesla situation - the CEO blatantly and outright lied, with the apparent intent of manipulating the company's stock, and all they got was basically a slap on the wrist. Intel's statement from their PR arm takes only a couple folks in an office continuing to review design concepts or production plans for one day beyond the date of the statement to get them in the clear.
Now to the crux of the story. It would be hard to blame Intel for looking to walk away from the 10nm node, especially with their rival moving to 7nm already. I'm sure they rather keep working on it, fulfill their original stated goals, but with as many delays as they've had, and seeming to be touching on further issues still, the better approach would likely be to continue working on whatever aspect can be transferred to the 7nm node and focus on that. Focusing more time on 10nm runs the risk of them delaying any future work on 7nm for a prolonged time, giving AMD a future path towards stepping an entire node plus ahead of them in R&D. If I were Intel, I wouldn't want to simply bank on AMD stumbling and letting me get back a big edge. I would want to continue pressing my advantages where I can.