Ordinals, Runes and anything that is decreasing the efficiency of the network while increasing fees. The purpose of the network is to provide a "peer-to-peer electronic cash" system. Anything that is not directly related to this mission should not be in the code.
Bitcoin developers pave way to the development of Ordinals and BTC20 tokens but they are not the developers. It was later seen as a bug which which might intentionally be included by bitcoin developers.