I don’t think there is a direct relationship between being humble and size of a building. Take Japan as an example, they have have many tall buildings because the land is limited and not because people are trying to show off. Whereas there are also places with mostly small buildings where corruption and waste are very common.m
Personally I would judge a number society by how it uses its resources not by the height of buildings.
You see the appearance or height of buildings do not really tell if the society is humble or wasteful. I think that the
real problem here isn't the size of buildings, but the value and intention the project do create. A big structure can be a smart investment if it's generates values or solves real problems, but it can also be unnecessary spendings if it's only for prestige and also the same goes with small projects. The main thing is that good judgement is supposed to focus on efficiency, cost, and the benefits it gives to the people and not just appearance.