You are making the assumption that Facebook actually cares about a solution to this - whether it be the curbing of fake news or the real-life consequences from

You are making the assumption that Facebook actually cares about a solution to this - whether it be the curbing of fake news or the real-life consequences from runaway political extremism and divisiveness that it's platform leads to. Facebook cares about making money, and only cares just enough to react to recent bad press because bad press means less money.