Couldn't agree more, but I think it's majorly a "geek" thing. I'm using i3 on my personal linux and aerospace on my work mac ; vimium in the browser, Neru on the other apps (does something similar to Neru). I recently ended up finding a way to create user-scripts for electron app and since then I'm adding vimium-esque extensions (e.g. in Teams) wherever I go.

I wish this was a default, but also that there was more of a standard to navigate UIs. That's why I really like vimium and other similar extensions, it's following the vi logic across websites, rather than having to learn everyone's idea of how to navigate.