And here's the thing about it: I don't regret it.
Not everything you COULD do is something you WILL do. That's what I've finally come to grips with about this issue. If I did set up a blog and add posts all the time, I'd probably make more money in the long run. I can't deny that reality. But I'd probably also make more money if I used exit pop-ups on my sales and squeeze pages, and I don't do that either. And I don't send my list a bazillion sales pitches every week, either.
There's nothing wrong with those things - certainly nothing even remotely wrong with blogging! - but I don't really have any interest. And I think it's important to accept these things about yourself. Find your own groove. Don't try to force yourself into someone else's.
I think my lack of interest in having a blog is that I like email better. I guess I'm old school that way. I prefer to talk to my audience that way. And there's something else going on here, too. Maybe you'll see this in yourself... I know, deep down, that I would not keep posting to a blog on a consistent basis. I don't want to "tease" people who find my blog and expect me to post on a regular basis. I know I wouldn't. So, this isn't all about me.
Find your own way. Cherry-pick what you like and skip the rest. As long as everything makes you money or sets you up to make some money down the line, it's all good. You don't have to do everything.