Or perhaps they've chosen to do this because they feel they have a responsibility to do so.
We understand this when tech companies publish postmortems of outages and security incidents--that it's an attempt to fulfill an obligation to users and the industry (and in some cases regulators), not marketing about how in-demand their product is or something. As far as I can tell we generally accept this as a default hypothesis even from companies led by people like Elon, Zuck and Kalanick--in part because we understand that these companies have thousands of employees, most of whom aren't marketers. Why are we uniquely conspiratorial about OpenAI?