I no longer attempt to rationalise inexplicable phenomena; there are explanations, Horatio, but they are likely to be beyond our ken.
I personally have never trusted museums. . . . It is because museums, broadly speaking, live off of the art and artifacts of others, often art and artifacts that have been obtained by dubious means. But they also manipulate whatever it is they present to the public; hence, until Judy Chicago, in the 1970s. . . few women artists were hung in any major museum. Indian artists? Artifacts only, please. Black artists? Something musical, maybe? And so forth.