The problem is not JS, the problem is useless techonolgies like WebRTC or WebGL that can run without permission and that, I think, are used in 99% cases for figerprinting. And people who designed them and did nothing to prevent fingerprinting.

WebGL and WebRTC are hardly useless, but they allow you to collect way too much fingerprinting data based on the way they've been designed.

Neither WebRTC or WebGL are remotely ‘useless’. Very fair though to say that you would prefer to have them disabled and/or whitelisted for certain sites.