I hear what you're saying, but from a slightly different angle. I wonder if the profit motive creates a conflict of interest the same way that corporate news tends towards bias to satisfy advertisers.

I am thinking of exiting Facebook for at least a couple of months because my posts/shares (which tend to have a political slant or at least broader perspective to them) don't seem to get any reaction or be shared anymore. Neither do music, alternative culture, or sustainability/environmental posts.

If Facebook is unable to give people the dignity to fail at debating one another and be challenged by new ideas, then that may not be compatible with democracy. I hope they fix whatever is going on with their feed algorithm, and maybe 3000 people training AIs will help, but I wonder if the problem isn't technology.