Unless you're going to charge that students are being judged on their conclusions and not on their process, or are being indoctrinated to a particular viewpoint

Unless you're going to charge that students are being judged on their conclusions and not on their process, or are being indoctrinated to a particular viewpoint rather than exposed to and challenged by various viewpoints in the service of cultivating critical thinking tools, I don't think the issues raised cause any problems. The fact that professors may live in their own cultural bubble isn't a problem so long as they are competently presenting views to are new to the students. The primary goal is to develop the tools necessary to critically examine any incoming view. Not to simply be exposed to some representative panoply of views. Any such array of views will inevitably be incomplete (due time, if nothing else) and the evenness of their presentation inevitably open to challenge. So if failings of variety or fairness in presentation are deal-breakers, we're essentially throwing out any possible real-world examination of such topics, regardless of the particular bent of a particular professor or institution.