There's a difference between a small percentage needing something and a small percentage wanting something, though. If all wheelchair users could turn off their handicap at any time with no consequence, I think you'd be hard-pressed to find a wheelchair ramp anywhere.
If all JavaScript blockers users could turn on JavaScript at any time without consequences to their privacy and security, you'd be hard pressed to find JavaScript blockers as well.
If they're really concerned about privacy and security, their machine would be air-gapped and the web wouldn't even be available as an attack vector. What it really is though is a superiority complex fulfilling their need to be "better" then filthy JS developers who don't code in Rust and Scala.
