And I don’t think you understand the problem. Nothing is preventing Facebook from displaying ads. Facebook’s issue is collecting user data and using it to directly target ads. They can make it so that a user can opt out of personalized ads and still show ads to that person. Companies would still pay to display their ads, perhaps not at the same rate but that doesn’t mean Facebook would be losing money by serving those users.
Let’s not act like Facebook is going to go bankrupt if some of their users opt out of data collection and targeted ads.