I mean, you are. You are adding friction to the process. If someone wants to talk about a post of yours they have find some forum where it would be relevant and link to it. I don't know what it looks like on your end. Maybe adding the ability to comment would be more effort than you think is worthwhile, but if it was as simple as a checkbox, you would still leave it turned off, am I wrong?
>I personally find internet arguments to be a waste of time most of the time
Of course it's a waste of time. So is blogging, as well as many other activities humans engage in.
>I propose to you that you should be in favor of a diverse internet
I'm naturally going to be for an Internet that accommodates the things I want to do, against one that doesn't (when it could), and indifferent about one that accommodates things I'm not interested in. I don't know what your blog is, so I don't want to comment on it, so I'm indifferent whether it gives readers the ability to comment, so I don't particularly care to try to convince you do anything.
But, I have felt that tiny bit of frustration when I read or watched something and scrolled down to see what people said about it and saw there was no comment section, either by design or omission. Sometimes that has been enough to disengage me from the thing in question.