(Physical barriers can be tricky to get right too, though - there have been incidents of "worker crushed between robot and inside of safety cage" though design standards have been updated in response to that.)
Top picture:
https://m.yna.co.kr/amp/view/AKR20231108062151052
I've been trying to figure out the brand but enough of the text on the arm is obscured that I can't make it out beyond NZ...MI or something to that effect. I'd love it if someone could figure out what make and model it is. It's a palletizing robot, it looks superficially quite a bit like the Kawasaki models but the brand name fragment clearly doesn't match that (and that would be Japanese, not South Korean).
So, maybe one of https://www.nachirobotics.com/product/lp180/ (or a similar model, they have half a dozen in the "kawasaki cp180 knockoff" scale...)
That thing has 3 meters of reach, so a dome with a 3 meter radius would be within reach of the arm at maximum extension. You might feel quite safe with the arm retracted or pointing away from you but all it would take is a limit switch that is busted for it to be able to reach you.
You couldn't pay me to get near one of these with the power on.