I'm not familiar with his work but from a quick search it seems that he's a hustler and is very "eye on the prize." I would think that your characterization of his process is too blasé and that there's actually more conviction behind it, but of course I don't know either. Most of the time I would say that prolific people that seemingly casually whip things up have learned to affect that and there's usually a great deal of obsessiveness happening behind the scenes.

Also, I don't much like the framing of "you don't believe in the projects." It's not meant to be a fault of the person, and I'm sure Pieter and others have graveyards of half-baked projects (which may even be revived one day) - it's part of the process - but I just mean to say that you haven't yet hit on the idea that keeps you up at night (or some nights at least) until it's been realized.