That’s really the defining characteristic of conservativism. There is no objective conservative idealism, only the defined self and its interests. Conservatives claim to favor low taxes and small government, but have no problem raising taxes on people who aren’t them or their donors, and will abuse government power to invade privacy or control economic influences to benefit themselves. Conservatives claim to be the party of “traditional morality” (which of course means whatever they happen to personally believe) but they will lie, cheat, fuck, steal, and kill as much as any other group, and will defend their members as long as they themselves are not victims of the transgressions.
I could write a book, but it boils down to egocentrism. If something benefits a conservative, it’s an important tradition, and if it does not benefit a conservative, then by golly we should get back to a time when it did.