I enable JS for sites I feel are valueable for me. The first impression is always without JS. If navigation-buttons dont work without JS - I just leave.
I am too small a group to be cared about. But in my opinion only poor designed websites use JS for layout or navigation. And the way back to the search-engine is always just one mouse gesture away.
JS = code written by someone with not neccessarily my best interests in mind running on my computer.
I doubt she tries to prove anything. It is probably rather the peace of mind of not having ads stabbing in your eyes, subscribe popups appearing as you scroll, things wiggling around, images fading up in a popup instead of loading directly, protection against exploits and saving bandwidth just to name a few benefits.