Bricks are aesthetically unpleasant
Whenever you look at ruins of the ancient cities, or modern day cities, you look at bricks and immediately you don't enjoy what you see. Even limestone bricks are aesthetically unsavory to the eyes.
https://www.google.com/search?q=limestone&client=firefox-b&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjYpNvV36nTAhUDqxoKHRn-BHkQ_AUICCgB#tbm=isch&q=limestone+bricks
Traditionally, the term brick referred to a unit composed of clay, but it is now used to denote any rectangular units laid in mortar. A brick can be composed of clay-bearing soil, sand, and lime, or concrete materials.
We should go back to building with huge building blocks
https://egyptmylovedotcom.files.wordpress.com/2012/06/img_7612-2.jpg
http://s.ngm.com/2012/09/roman-walls/img/thamugadi-arch-algeria-615.jpg