The code is a legal requirement. If the code did not set mandatory minimum widths for parking stalls, builders could still set them at 9 feet wide.
The point is that if you are builder who wants to build a 7 foot wide parking stall (or avoid parking stalls altogether and just have the cars park themselves as efficiently as possible) you are not legally allowed to do this.
The point is that if you are builder who wants to build a 7 foot wide parking stall (or avoid parking stalls altogether and just have the cars park themselves as efficiently as possible) you are not legally allowed to do this.