Personally I don’t find “everyone is doing this so it must be rational” a very convincing argument. After all, maybe everyone else followed that same weak argument.
But conversely how do you think everyone arrived at an unsafe practice particular to just these doctors who do handovers and no others? And why do you think they’re campaigning themselves to bring them back for safety in the UK?
All of these countries didn't independently discover medicine, and they do speak with each other i.e. they share a culture. Why do they all dress the same, why are so many addressed with a title in front of their names, and why do they all seem to refer to a lot of things in Latin?
We can choose to think that they independently arrived at an ideal state, but that's not reasonable.