D&D has been appropriating and misapplying terms and concepts for its entire - now rather long - history. It has shamelessly plundered pretty much every culture and belief system, past and present, in order to fuel an esoteric vocabulary of stuff for no other reason than it looks or sounds cool. This is primarily due to the positioning of its creators who - although no doubt well-read in a certain sense - were steeped in ideas and understandings which were already painfully outdated at the time of the game's inception in the 1970s, and were intent on including "exotic" terms within the game in order to create a certain literary feel. I am sympathetic to this aesthetic urge, but today is 2021, and times have changed.
Some of these terms are innocuous ahistorical inventions which have entered the wider game-playing consciousness (e.g. longsword); some are based on 19th-century ethnological or anthropological ideas (race, savage, primitive, tribe); some reflect Victorian Romanticism (druid); and so on; and so forth. The misappropriation continued well into the 3E era where we added chausubles and dorjes and Spirit Shamans and heaven-knows-what else. In many cases, the appropriation has not been intelligent or considered - although I'm not sure that makes much of a difference, in terms of whether it is entirely suitable or proper.
I love the 1E Deities and Demigods, both for the nostalgia it evokes in me and in recognition that - had I not encountered it - my own, lifelong, obsession with religion and mythology might never have been sparked. But when I open the book and look at the Indian Mythos section, I need to squint and consider its context and all of its Orientalist glory: at best, I can afford it a kind of charming naivete. And I sometimes wonder how much damage it has done, in terms of how it has shaped countless, plastic, pre-adolescent minds in their understanding of myth, religion and religiosity; just a few days ago, a poster casually mentioned Kali in the same breath as Tharizdun and I cringed inwardly. This confusion is due to the Indian Mythos section in the 1E DDG, and to Indiana Jones and the Temple of Doom - because what else could it be?
With New Religious Movements we are presented with another ethical question: terms like witch, druid, shaman are self-identifying names for people who profess a particular spirituality. There are various forms of ethnic religiosity which have crystallized in recent decades around Norse, Slavic and pre-Abrahamic Hellenistic thought. We might dismiss these ideas as reimaginings, misappropriations and inauthentic, but we are then left with the problem what are the criteria for authenticity, and who gets to decide this? The reasons why we don't use terms like Rabbi or Imam in the game are the same reasons we should be cautious about using any term with religious overtones. At the end of the day, all religion is invented by people, somewhere, at some time, for the same purpose - to forge an ethnic and/or cultic identity and foster a sense of inclusion.
There are no simple answers to these questions, which I guess is my point.