In general, we need a large number of sub-buildings to create render scenes that show the actual structures. In fact, they don't have to be very detailed. Or it happens only if there are boxes, but in some projects this is not possible.
In the coatings of these structures, we generally prefer ongoing coatings. In this way, we do not need to spend much time for these background structures.
Actually, I don't want to work hard on these models :) It may be necessary for only a few side projects. Although it seems like a waste of time, it is still necessary to complete small details.
I really wish the architect friends patience...