I don't think violations should be ignored simply because more egregious ones exist. There's no reason both can't be pursued. For example you don't ignore muggings just because some people are commiting murder. In this case, Joi deliberately violated policy in accepting donations from Epstein. I agree the University shouldn't devote significant resources to policing donations that in all likelihood are legitimate in the vast majority of cases. But when something like this falls in their lap, there's no reason to ignore this just because other bad things happen, say a coach that might be taking million dollar bribes to get a student admitted.