We wouldn't have this mindset if sites retained enough basic functionality with it off, which is totally possible. I use NoScript pretty aggressively, and it's astounding how many sites actually render nothing unless you have JS turned on. Browsers and backends both implement form validation, yet most sites today don't support submitting a basic form without JS. I'm not expecting things like Spotify and YouTube to work without JS, but I should be able to at least read most webpages without running full-fledged applications with 7 different tracking scripts and 5 custom fonts.