I don't see how this makes the "JS availability should be the baseline" assumption any more legitimate. We make it possible to function in a society for those 6% of people. Low percentage still works out to a whole lot of people who shouldn't be left out.

I disagree. The world is under no obligation to cater to a tiny minority who self-select into reduced-functionality experiences.

It’s fine for you to turn off JS. It’s also fine for developers to require JS. Software has had minimum system requirements forever. I can’t run Android apps on my Palm Pilot from 2002 either and no one is obligated to make them work for me.