In a modern secular society, cultural critics are heirs to the role of moral explicator that priests held in traditional religious societies. If chemists or physicists or anyone else with "intellectual authority" wants to chime in with moral lessons of their own, fine -- but I don't think the *primary* duty of scientists et al. is to provide moral instruction. Not everyone can understand particle physics, and there is no social necessity that everyone be able to achieve such understanding. However, society is badly crippled if there aren't intellectuals whose primary task is to examine moral issues in a way that people in general can grasp ; that job logically belongs to cultural critics.
Carl Remick