The white man’s burden is also used referentially to call out people who do things like travel to poor countries to build houses even though they have far less building experience than locals and the money they paid to get there would have gone much further, had it simply been donated in the form of building materials.

I don’t know how RFK Jr. is using it, but it almost certainly makes no sense.

Edit: oh, voluntourism! I knew there was a term for it