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.
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.
