I don't mean it as any kind of rule of course, it's a massive generalization. But in general in Europe we are more used getting on the train without a barrier

I don't mean it as any kind of rule of course, it's a massive generalization. But in general in Europe we are more used getting on the train without a barrier and then later having to show our ticket to the conductor who walks through the train, compared to having to pass an impenetrable barrier by showing our ticket just to get onto the platform. Obviously both systems exist in both places, but I think the former exists more in Europe. It is just a comparison of course, take it as you will. I do find someone checking my bags randomly bit annoying but I prefer it to fighting an automated system that manages a poor approximation of figuring out what you put in your bags. At least in the Netherlands I have not seen that latter kind of system here, and I suspect it's precisely because people would not like it.