Your point is true, but the one I was replying to was focusing on the aesthetic aspect. For them, the sameness of UIs, while functional, make for a drab experience.

My point is that I don't find this to be case. Rather, consistent UIs, while functional, are also beautiful to me. The constituents of the UI can be designed with aesthetic taste, but the way it is all put together consistently and functionally has a beauty all its own.