I'd never thought about it like that, but it's a nice side-effect. You don't have to worry about obtrusive JS, if your browser doesn't know what JS is. :D
It's worse than that[0] - Lynx statically renders the page at load time which means any "dynamic" updates just can't happen. I did have a bash at integrating the Mozilla JS engine but gave up after realising that anything more than just `document.write("flange")` handled at load time would need the entire inner engine rewriting and that was/is far beyond me[1].
[0] This is based off my memories of the Lynx source back in the Olden Times, ~1995-2000ish.
[1] But I did do the original cookie jar and colour styles (as seen in the screenshots) work (`lynx.lss` is all my fault, sorry)