Such exhibitions offered a European audience the chance to experience contact with non-Europeans up close and to learn more about them and their cultures.
You can see here how we now face the dilemma of ethical museums. They originated for the amusement of the Europeans with no regard to the humanity of other people. I think this gives a good insight into the orgin and source of a lot of the negative european bias and what they were exposed too. Like we mentioned from a previous writing, many Europeans were not able to see first hand how brutal and dehumazing the colonization in Africa was. They were only told or shown what benefitted the outdated European agenda.