I bought the high boots at WM.
I'm in CT and it is not unusual to have floods that cover the parking lot and low ones would not be high enough to get to the dock.
That being said I have needed the high ones probably 3 times in the last three years.
If they go in sale here again I probably pick up some short ones as they pack easier as I travel a lot for deliveries.
If you don't care about storage space one the boots are on its only a problem if they are too short.