You've got it back to front imo. Twitter was a useful tool for disseminating info, whether for protest movements, political movements, whatevs. Pre-Musk, there was a degree of control on twitter re disinfo, harassment, hatred etc. Now, it's no longer a useful tool for leftwing people to gather and share their thoughts; it's no longer a useful tool to disseminate information; it's no longer a tool for rallying protestors.

Look at who invested (Saudi kingdom); look at when Musk took it over (mid-terms); it seems pretty obvious to me that the takeover was a very expensive purchase to make the actions of oligarchs & despots that much easier.