The problem is not with Ross's professionalism (how far he understands the limits of a particular gig, how far he understands the sensitivities of the community) - although they come into it. The main problem with him as host was and always has been with the permissions that his reputation gives others with less sense. Even if he were perfection personified and gracious and welcoming and charming and affirming, idiots would read the Wikipedia article and take his public presence as a permission.