Well, zero criticism IS a form of criticism so I don't blame the author for not being motivated after the fact. I'd even say its the worst kind of criticism because it leaves you with nothing to build next.

But I think they are highlighting an important thing here that most of us struggle with...building is fun, progress is discrete and clear, the feedback loop is very tight. Selling and marketing to people sucks, its clunky, the feedback loops are variable, and if you're inclined more to being an introvert it is very exhausting.

I'm not sure the author is conditioned to fail as much as they are just more inclined to build.