It's trivial to build an uncensorable Twitter clone on an EVM-based chain. You could even have a DAO determine the rules for content moderation. The fact that writes cost gas also reduces incentives for the spamming endemic to social media today.
The only part that still is cebtralised is DNS but you don't need it, you could just pass about the address or use ENS.
Either way the technology makes this sort of uncensorable application quite easy to build. Why do you feel it's silly?
Every single one of these things can still censor your access to content on the network whenever it wants. I do not believe the presence of a blockchain changes anything there. All it does is make speech cost money.
You realize that if free speech has a price, it's no longer free, right? Like it's only "free" if you can afford it.