Yes. The same argument that he uses to defend “lazy” people can also be applied to “morally repugnant” people (e.g., they haven’t been taught to think correctly

Yes. The same argument that he uses to defend “lazy” people can also be applied to “morally repugnant” people (e.g., they haven’t been taught to think correctly about these things and therefor draw erroneous conclusions). That doesn’t make the argument wrong, but it does mean that you have to give pretty much anyone a pass. Most people aren’t willing to do this.