One key factor in Paris is that automated trains are more "aggressive" in closing doors right on schedule where human drivers would tend to wait one or 2 second

One key factor in Paris is that automated trains are more "aggressive" in closing doors right on schedule where human drivers would tend to wait one or 2 seconds because you have a lot of people getting onboard.One or 2 seconds doesn't seem much but it can ruin the whole schedule because if you do it on 2 stations then it can add to 4 seconds, and then the next train needs to brake or even stop and lose even more time, and it cascades etc. until you can't keep a super tight schedule. It has even happened to me once that the station and trains were so packed that the train came, people barely had time to get out and the doors closed already, with not a single person able to go onboard before the doors closed. Obviously feels bad but helps train keep schedule and it is a net positive in the end, but I suppose it is psychologically tough for drivers who would have to have that kind of constraints, they would really feel like a machine.