I'm not sure how to parse your grammar.

Are you saying that different people all say they will do the same ('good') thing on Milgram, but in practice different people do different things on Milgram (some 'good' some 'bad')?

Or are you saying that there is a large difference between what people say they would do on Milgram, and between what they actually do?

(Because replications of Milgram are prohibited by modern ethics boards, the data is weaker than I'd like it to be.)

You also say that I overstate the difference in values between people. But Milgram ran his experiment just once on very homogenous people: all from the same culture. If he'd compared it to widely differing cultures, I expect at least some of the time the compliance rates would differ significantly.