This is a common myth. The vast majority of blind and partially sighted users don't use text-based web browsers. They use normal web browsers in conjunction with screen readers; these browsers can execute Javascript normally. There is nothing inherently inaccessible about Javascript-based content.

Screen readers work just fine with regular browsers and JavaScript - it's not like visually impaired users are using Lynx.

Exactly! All big ones like NVDA, JAWS, VoiceOver, etc, are fully capable to read and interact with craziest single page application build and rendered in your browser