Security doesn’t have to be that variable. Flights are all planned weeks in advance. TSA can pretty exactly predict the passenger volume in time to schedule e

Security doesn’t have to be that variable. Flights are all planned weeks in advance. TSA can pretty exactly predict the passenger volume in time to schedule enough workers, it’s just that sometimes they don’t. If they were going to be short staffed and needed people to come early, they could notify the airline and the airline could notify you that you needed to come early that day.