What are architects for?
Everybody has to do his own work. builder - build. Backer make bakery. Scientist discover rules of nature. Religionist
seduce people to doctrine. Programmer - programming. Med.Doctor treats patiences. Metallurgist works near blast furnace. Politic to lie. Troll write to topic. And so on...
An ordinary man cannot design a building that is efficient, beautiful and maximises the potential of the site. Architects do not receive at least 7 years of training for nothing. There is so much more to designing a building than merely drawing four walls and a roof. An architect thinks about the experience of the building and how the user will move around and use the space.