When people build houses, parks, buildings, etc. it takes a bit of strength to successfully and neatly make the building. It also requires knowledge to know what wires go here and there, and without that knowledge on what to do you’re creating a safety hazard in so many ways, such as building the support wrong and having the roof fall off, cause an electrical fire, if something happens to it or its not properly installed it might destroy the place, cause the basement to collapse etc. However, while making a Roman City they didn’t have the technology to make wires, it would be the same almost except the Romans can’t use the futuristic tools we have. Without strength and knowledge of building a city, it’s almost like a black widow will lose