there would be no money\work for the architects if they only made 1 design.
why do they need bus shelters at a school the bus driver knows when school is out and is waiting. But they are in the design, you get work\money and the architects get their commission for specking them into the design. The more the building costs the more the architects make. Further more the public pays for it with their tax dollars so in the end you are paying yourself Micky.