Like CAs, the power company can be controlled by the government.
Let's say governments ban youtube-dl. The prosecution gets a court order to order CAs to not renew youtube-dl.org. If they're using a Let's Encrypt style 30 day certificate, youtube-dl has 30 days to comply or be soft-banned from the internet.
Why go to the CA when they can just order the domain itself to be shut down? If there's a court order against you, your site being HTTP won't save you.
Let's say governments ban youtube-dl. The prosecution gets a court order to order CAs to not renew youtube-dl.org. If they're using a Let's Encrypt style 30 day certificate, youtube-dl has 30 days to comply or be soft-banned from the internet.