The FAA wins because a measure of safety for lap children will have been provided, which to date has not existed, and at no cost to the airline. Congress and Airline Industry will avoid issues involving government-mandated fares, price discrimination among travelers and potential airline revenue losses. Gives the child two years of age and younger a seat belt that fits him or her and prevents them from being thrown about the cabin in adverse conditions. By the parent assuming their proper position, it also forces the lap child to assume their proper position. There are also concerns about the proper use of a car seat on an airplane.
Crashes usually involve smoke and fire.
Time is of the essence. Think of how long it takes to unlatch your child in a car. Car seat does not. With car seat, the child does not have this opportunity. There are also concerns about the proper use of a car seat on an airplane.