As per Don Norman’s (author of “Design of everyday things”) video below from 1994 about objects and the affordances that they enable:

“The value of a well designed object is when it has such a rich set of affordances, that the people who use it can do things with it that the designer never imagined.”

While value may not be what affordances create/lead to, a well designed object does in fact enable their end users (and possibly even viewers of those interacting with the objects) to do activities that the designers of the object did not anticipate.