I don't think is fanaticism. It's about easy of use and workflows. Most of the desktop apps and websites don't care about keyboard navigation (and usability) a

I don't think is fanaticism. It's about easy of use and workflows. Most of the desktop apps and websites don't care about keyboard navigation (and usability) and you have to use the mouse no matter what. When your main workflow is keyboard based, changing to the mouse and back to keyboard is very disruptive. When you use a tiling window manager such as Sway or i3 this is even more important. Also, TUI applications go straight to the point, load extremely fast and barely use any computer resources.