I think it's more than you think. I think Notch expressed clearly that he did not expect nor want his project to become a big hit. He may have been flattered for a while but he now sees it clearly: success is shit, big success is a shitstorm.
The exact opposite of the entrepreneur spirit. I think pg may have overlooked this side of the hackerhood.
I guess part of the reason I feel the word "hacker" lost its meaning today is the rise of paper-toilet hackers (https://news.ycombinator.com/item?id=8319102).
I'm not critisizing him, I'm glad he has that opportunity, and I'm glad he's recognized what opportunity he wants (which is apparently NOT the opportunity to try and make even more money).
But it's a bit more complicated than "success is shit", success is what's allowed him to ignore success from here on out, without having to worry about a roof over his head, health care, etc.
Maybe, probably, he was already able to hack things he liked without worrying too much about survival: he actually did I guess, when he started Minecraft.
The problem is that he got an offer he could not refuse (as in The Godfather)...