I have upvoted ya fwiw and I don't understand it either why people would try to downvote ya.
I mean, if websites work for you while disabling js and you are fine with it. Then I mean JS is an threat vector somewhat.
Many of us are unable to live our lives without JS. I used to use librewolf and complete and total privacy started feeling a little too uncomfortable
Now I am on zen-browser fwiw which I do think has some improvements over stock firefox in terms of privacy but I can't say this for sure but I mainly use zen because it looks really good and I just love zen.
It's also been torture, I definitely don't prescribe it. :P Like you say, it's a sanity / utility / security tradeoff. I just happen to be willing to trade off sanity for utility and security.
And yes, unfortunately I have to enable JS for some sites -- the default is to leave it disabled. And of course with cloudflare I have to whitelist it specifically for their domains (well, the non analytics domains). But thankfully wikipedia is light and spiffy without the javascript.
That being said, Once again, Librewolf is amazing software. I can see myself using it again but I just find zen easier in the sense of something which I can recommend plus ubO obv
Personally these are more aesthetic changes more than anything. I just really like how zen looks and feels.
The answer is sort of, Just personal preference that's all.