I get this reaction. But it's worth remembering that, to a great extent, today's sensitivities are reactions to extremely callous treatment of native peoples in the past--including by scientists and other researchers (such as unauthorized exhumations for archaeological study). I also wouldn't conflate the researchers' willingness to allow the descendants of these people to control the recordings with stinginess on the part of those descendants in sharing them with the world.

"Enlightenment" likely has nothing to do with it.