Right, but I often want to read those sites so I don't bother (but perhaps I should go for it). Though really I'm speaking vicariously through the hoards of non-technical people who don't even know what JS is who enjoy long battery life.
You can enable per domain by clicking on the lock icon by the URL.
That said the modern web is generally very broken with js off, but it does get rid of most cookie banners, modal email sign ups prompts and generally lets your read article number 6 of the 5 free ones.