"As the Americans learned so painfully in Earth's final century, free flow of information is the only safeguard against tyranny...Beware of he who would deny you access to information, for in his heart he dreams himself your master. Commissioner Pravin Lal, 'U.N. Declaration of Rights' "
This had until recently been only tested for top-down information. Nowadays, everyone can be a broadcaster and we're seeing quite different results.
Doesn’t mean a locked down system is better though. With that they don’t have to bother.
What you need is a decentralized system resistant to propaganda techniques.
Counter to the above is that, your bad actor may be my leader. People like convenience. When someone is expressing what you want to say, in a better and smarter way, you just reshare/retweet them. And the 'other side' will feel like your leader is a 'bad actor' who is flooding the system. So even the method of resharing/retweeting needs some sort of provenance/single use only. So you can 'agree' with your thought leader, but they shouldn't be able to mass manufacture consent. Since you might even reshare 'fake news' since you generally trust your leader. It's messy, not sure what that would look like - every post that starts getting traction needs to be fact checked? Community Notes on X is a step in the right direction maybe.