That's a squishy headline. That Facebook is too influential (both directly in terms of the impact of their policies, and indirectly in terms of its power as a misinformation amplification device) is abundantly clear.

Not to say that I have a solution for it. Anything I can think of has its own problems. But, we should accept as a truism that any centralized service with that much sway over multiple hours of hundreds of millions of people's days is "too influential".