This is not only about people who disable js, but also about people with disabilities who would benefit from accessibility features on your app. With this arguement, we should also ignore them, since they might not be the ones making the most traffic i.e. revenue for us.
There is also the increasing number of users who disable trackes out of privacy concerns. At lease most of the marketing guys I've seen still assume what trackers show is all there is.
I’m not saying it should be that way on purpose, I’m saying that’s what you can expect. No one tests for people using terminal browsers or IE4. Noscript users are in the same niche. I understand why you’d disable JavaScript but I don’t understand how people expect those who make web apps to cater for that.
You can expect all you want, I expect you’ll be disappointed. The goal to keep the web in that languid state is of the same ilk of the buggy whip. It’ll have archaic use cases, but the numbers won’t make sense for a lot of if not most future endeavours.