Why? Are there specific examples of WSJ reporting using unnamed sources that turned out to be false/misleading that led you to this conclusion? Unnamed sources carry some risks, sure, but it's obvious that few people would be willing to put their named to leaked info like this.
"In 2019, Altman was asked to resign from Y Combinator after partners alleged he had put personal projects, including OpenAI, ahead of his duties as president, said people familiar with the matter."
A statement declared to be false by the person who made the decision, in evident increasing frustration as the falsehood purpetuated.