I can see it both way. I never liked MMM types because they preach what I consider extreme frugality. As a core principle of my finances, I focus on the uncapped income side of the equation and practice what I consider modesty in my expenses. I have no desire to be flashy or flaunt the wealth I do have. But I’m sure as hell not living off the grid in the middle of nowhere because it cost 10% of a home in a metro area. Thing is, I’d never even consider it because my wife doesn’t want that, and it’s important for people to be fully aligned on that.
I found the post you linked to overly verbose as these bloggers often are. They make lists and sections and go on tangents on what could be a 300-500 word essay. I think he could have excluded the backstory and just focused on how important it is that your partner be onboard the FIRE/extreme frugality lifestyle. So I think it’s poorly written and not an enjoyable article. However, it’s a pretty damn important message and difficult to talk about until someone prominent that is serving as a poster child for the FIRE niche like MMM goes through it publicly.