That's a misleading analogy though. Nobody is proposing "rebuilding" Avebury - which for the analogy to be reasonable, would mean re-erecting every missing stone (including replacing some missing stones with modern replicas) and re-digging the ditch and raising the bank. Not to mention removing the village.

A more accurate analogy would be to compare restoring some stones to the restoration work already carried out successfully at many ruined castles and abbeys.