Problems with Brake lights on Chevy Lumina?

The engineers that designed the electrical for the Lumina have impressed me.  Typically the brake lights are controlled by a switch that is made by pushing the brake.  On the Lumina in addition to this switch they ran the wires through the blinker switch.  So if the brake lights quit working check the blinker switch.  I had this problem and had to replace the blinker switch to make the brake lights work.  I wonder what the engineers was thinking when they designed this?