Only on Hacker News could people find flaws with such an awesome idea and execution.
Not all songs have hooks or refrains. Only the most formulaic ones.
Not all songs have hooks or refrains. Only the most formulaic ones.
Even the most abstract art is not about splashing paint in a canvas and calling it a day. It's about doing something close to this, but creatively and within a specific framework.
It takes much more skill to produce songs with hooks and refrains than to produce random music.
But it takes even more skill to produce something that is creative, not formulaic, but still has some structure that's pleasant/fun/interesting/etc to the listener.