Even if humans have loyalty, authority and sanctity built-in, they can still recognize their instrumental role and can only instrumentally optimize for those.

The trouble is, absent certain unusually favorable circumstances, attempts at such optimization run into insurmountable practical problems. For start, such analysis would be tremendously difficult even for a superhumanly unbiased intellect. And then there is the even worse problem that realistic humans will be under an almost irresistible temptation to bias their analysis in favor of their own particular authority, sanctity, and in-group norms.