See what happened to Alex Jones, regardless of if you think it was justified or not.

With a crypto wallet, you don't have to start from scratch with a new account on a service that doesn't ban you because you own that data, in theory you could even port your social graph over.

I don't think this is inherent to crypto, but it is inherent to decentrazlied open standards like Mastedon for example. The advantage that crypto "wallets" have here is that it's not just for social media, it can be for payments etc.