That's right. Plus, I don't think *G allows access to the few arrival lounges that are around. Not sure about RCC membership on arrival lounge access, though.
LAX
RCC membership don't have access to arrival lounge. The only club membership has arrival lounge access I can think of is Air Canada in LHR T3.
UA Arrival lounge is only available to UA passenger in business(exclude upgrader) and first.