That's an artificially induced cost, though. You are correct that I'm going to have to letsencrypt my blog if I want to people to be able to read it (I might just take it down). But I don't think the people are correct who are saying that a) there's any good inherent reason for me to do that and b) this will cost me no time or effort. I've done the LE thing before and, at least in my case, it's not a zero-effort thing.

In this thread alone you've already expended more energy than it would have taken to just do the right thing with your blog.

This is incorrect - I won't go into details as I'm busy fixing my server and need to go out in a couple of hours.