It’s kind of weird how the art world says “this person made some great works ergo all of their works are precious”. I remember seeing in a museum some doodles Picasso made on a restaurant napkin or something. And it was like “what was he trying to say drawing his friend as a funny looking animal man?”.
The art world, or the art market? I can see a historian of art finding interest in an artists doodles. But would the acquisitions arm of a museum want them, unless part of its mission was to serve historians?