Generally speaking, getting good performance out of a database mostly comes down to understanding how the thing works and then not making it do a stupid amount of unnecessary work. I expect someone who understands that would also not e.g. fetch a script that then fetches the actual text instead of just sending the text. For example Markus Winand's sites work just fine with javascript off.
For ML stuff I'd let e.g. mathjax fly, but I expect the surrounding prose to show up first to get me interested enough to enable scripts.
It's not an exact filter, but it gives some signal to feed into the "is this worth my time" model.
It's also odd to characterize it as fanaticism: scriptless sites are the default. If you just type words, it will work. You have to go out of your way to make a Rube Goldberg machine. I'm not interested in Rube Goldberg machines or the insights of the people that enjoy making them. Like if you own a restaurant and make your menu so that it's only available on a phone, I'll just leave. I don't appreciate the gimmick. Likewise for things that want me to install an app or use a cloud. Not happening.