There is a generation of people who do not know the joy of waiting for someone as people deplane at the airport. A long time ago, visitors to the airport could freely walk up to the gates without a ticket or screening. This included the international and domestic terminals.
Due to 9/11, security measures were put into place that have cause long wait and headaches for the flying public. Unless, you are willing to pay for the privilege of avoiding the masses. Its added hours to the margin for arrivals especially during the heavy travel times.
At some point, the world will be a better place and we can arrive at the airport 30mins before boarding and make it on time