It really doesn't matter if a personal blog decides to serve only http as a niche protest. But you really don't want to go back to the times when most sites were http; we had:

- Massive government spying programs, people forget that Chat Control used to be the standard, everything you ever browsed, posted or said online could be monitored

- Tracking that you could not disable, where your ISP would work with publishers appending http headers to every request that uniquely identified you.

- Not only little guys, as you say, were using http, it was government sites, news sites, a huge part of the internet was unencrypted and vulnerable to mitm. As you say, yes, it's not the only attack vector but it was one of the easiest to exploit, where any random wifi access point you're connected to could steal your credentials.