I would say corporate inertia but also a mix of corporate immaturity and single minded incentives.

Meta’s corporate culture is single mindedly focused on engagement. They don’t care about side effects or other ambitions. They don’t have a corporate structure that encourages anything else that may be beneficial to their consumer base.

It means that anything that detracts from that engagement is counter to any personal goals an employee might have. And if you can’t personally relate to the problem, you’re far less likely to put your career on the line to push for something that runs contrary to the singular goal of engagement.