I am sure it is really a spectrum but sometimes it seems there are two kinds of people: those that sympathize with the kind of thinking the blog post describes, and those that find it insufferable.
I think what you're describing are those who are able to learn to be present, versus those who are cynical. I also think there are more than just those two kinds of people in the world; it is far, far more varied than just this binary, so I agree it's a spectrum.
In general, though, I find cynical people insufferable, because they find everything insufferable.
I guess I must be in the first group, because I can’t really understand how someone would find it insufferable. It’s basically just telling you not to be cynical about everything, and to notice that some things do indeed get better.
It reminded me of wabi-sabi, which essentially says you should appreciate the imperfection and impermanence of things.