Changes to what is presented as the Dhamma mean that it will eventually lose is efficacy. Burying it under vast amounts of cultural baggage will have the same effect, since we will be wasting time and effort on useless side issues. But the fact that change is inevitable does not mean we have to credit Buddhist doctrines that are contrary to what the Buddha said; we still have a duty to see through what is false, and what is unnecessary. Why would we want to spend vast amounts of effort on practices that do not lead to Nibbana?