One of the reasons Facebook is in this sticky privacy situation is the complacency at the top. For many years, management has denied its social responsibility to moderate the content that appears, claiming to be an unbiased 'platform'. They ignore years of 3rd party studies that show that they are creating echo chambers.
Even after getting "Exceeds Expectations" cycle after cycle, I found it difficult to influence the top-down decisions. A group of engineers & analysts may prove a huge opportunity in developing a feature, with data and all, but if it's not the direction coming from the top, then it's unlikely to get resourced. They don't always put in the effort to discuss the pros & cons of these strategies.