Consider how we as humans treat other non-human creatures. Do we consider the intelligence of a chicken, for example? It's inconvenient to do so, as it would suddenly thrust upon us ethical considerations to how we treat them. We (some) would rather just factory farm and eat them.
Perhaps because of our own limitations (culling less likely useful streams of thought) we tend to disregard things we don't understand. That does not mean they are lacking in value. It just means we have not made much effort to ascertain their capabilities.
Consider this perspective. If you were a stock investor, how would you value a modern Beethoven? You might try to determine the potential value of sales of his creations, but you would likely disregard the non-financial value of his music. Does that mean his music was not worth much?