Check out his other work 4'33". It's an even more extreme try at silence as music.

https://en.wikipedia.org/wiki/4%E2%80%B233%E2%80%B3

It looks like this is his gimmick.

https://en.wikipedia.org/wiki/4%E2%80%B233%E2%80%B3#/media/F...

Haters gonna hate, but there's not much more to his work than using extreme pauses and tempos as art. Maybe it's meta art.