"More speech" works when the number of voices is limited to an actual number of people. The truth would eventually/inevitably drown out the conspiracies and disinformation. Now, with bots and social media's algorithmic amplification, the "amount of speech" a single person can contribute is unbounded, and bad actors are weaponizing the unlimited nature of speech to drown out the truth.
"More speech" is too simplistic to work in the modern world.
In general, when someone suggests the only solution to "too much free speech" is for people to be filtered, I say "You first."
The courts. They can be sued if they abuse it.
I don't want to live in the world you suggest.
This right here is why I am glad we have a constitution in the US and resist efforts to make it easier to change.