That's what has always driven me nuts. No matter what the security process is, you know exactly how many people are going to show up within a couple hour window. So you should be able to make at a fairly constant amount of time. The flights are scheduled months ahead, everyone bought their tickets weeks ahead and confirmed within 24hrs. Everyone is beholden to adding more security steps like adding a personal phone number, DOB, and showing government ID, so if needed, we could add more steps to make things faster or help with capacity--many people are glad to pay for it with Clear and PreCheck.