I cannot explain this.
Never mind that how about they just obey traffic laws? Stopping at red lights or stop signs? Obeying speed limits? watching out for people who have just parked and are about to open a car door? That last one? This was tough to us as children when we first learned to ride a bike yet these grown adults don’t seem to know this and slam into open doors every time.
The one I hate the most? When there is a pack of them and they are blocking traffic because they won’t move to the right and let cars pass them.