Self-hosting doesn't solve free speech on the internet. The first person who doesn't like you will DDoS you off the net, and then you'll need to run and hide behind a service like CloudFlare. There are only a few such firms. If they've been pressured not to protect you because your opinions are deemed objectionable, then you effectively cannot publish online at all.

This is not a theoretical problem. After Quillette published the response of 4 scientists to the Google memo they were DDoSd off the net.