I feel this is complicated, because there are two issues at hand: norms and ethics, and they overlap, but not entirely.
I feel that a society that is inclusive is an ethical one, and thus games should always promote inclusivity, or at least avoid exclusion. The thing is, exclusion usually is the direct result of a social norm, and that current of exclusion running through society is always going to be there. So I would say it is best to adapt in ways that reflect basic ethical behavior, rather than necessarily adapting to modern sensibilities. Today's sensibilities may still largely reflect inclusion, but the way things are going, tomorrow's may very well reflect hate. I hope that if that is the case, developers will do what they can to resist.