An alternative interpretation (and the way in which I read it) was that the author is incredibly passionate about something mundane and his wife is very obvious

An alternative interpretation (and the way in which I read it) was that the author is incredibly passionate about something mundane and his wife is very obviously not interested anywhere near as much or at all, just like everyone else who likely stumbles across his blog. I don't think it was attempting to show disdain but acceptance, admitting that he builds a blog because he cares about it alone; even his wife doesn't read it.