Engineers with degrees work for the contractors. They minimize materials and cost. The result doesn't always remain standing, even without an earthquake: https

Engineers with degrees work for the contractors. They minimize materials and cost. The result doesn't always remain standing, even without an earthquake: https://en.wikipedia.org/wiki/Florida_International_University_pedestrian_bridge_collapse https://en.wikipedia.org/wiki/Florida_International_Universi... Building good bridges without an engineering degree is easy. You simply don't minimize materials and cost.