If the traveler must provide a CRS -
Think of changing planes -
- release your seat belt and collect your belongings, wait until you can get into the aisle, get into the aisle, walk down the narrow airplane aisle, up the boarding ramp, through the waiting area, find out the gate of your next flight, walk down the concourse, get on the moving sidewalk, get off the moving sidewalk, walk to the next moving sidewalk, get on the next moving sidewalk, get off the next moving sidewalk, walk to the escalator, get on the down escalator, get off the down escalator, walk over to the subway entry, rush into the subway car, hold on, rush out of the subway car, walk to the up escalator, get on the up escalator, get off the up escalator, walk down the concourse, get on the moving sidewalk, get off the moving sidewalk, walk to the next moving sidewalk, get on the next moving sidewalk, get off the next moving sidewalk, walk to the waiting area, wait(?), walk down the boarding ramp, walk down the narrow airplane aisle, find your seat, stow your belongings, get seated, fasten your seat belt.
Now, think of all the families with children changing planes, and carrying CRS(s) in addition to all the other stuff they must carry
Now, think of all the parents who will write their Congressman about that hassle