@yarns that notation means "emulate what other disco players do for anything that isn't written down" - like when to play notes outside/around a strict metronomic beat, and what notes to emphasize. In other words, create a disco "groove."

"If I would say mix multiple finished songs to be played in parallel tracks, the output likely will not sound like any music." - for what it's worth, renowned composers have done almost exactly that. See for example Charles Ives, who was inspired by childhood experiences of hearing multiple marching bands play at the same time: youtube.com/watch?v=niUXRKdpeZ0&t=520s

@phoog Out of curiosity - what are those pieces like, that you would describe their meter as asynchronous?

The analogy with sports games is interesting, because sports games aren't necessarily worse versions of the sports they're inspired by - they're different skills that have the potential to be just as deep and satisfying for different reasons. (Whether certain games reach that potential is arguable, but beside the point.) Similarly, writing music using a computer isn't a worse version of playing an instrument - it's a different activity that tests a different set of skills.

piggybacking off of @piiperiReinstateMonica - music theory is based off of music, not the other way around. While you can certainly use theory as a creative jumping off point, the only actual rule that music has to follow is that people like it or find it interesting.