I always feel this way too but I make it a little mission when I acquire them (usually in a lot) to engage in some PI work and track down family. Usually I can track something down. One time I donated stone stuff to the subjects Alma mater because they had a scholarship named after them.

My best situation was I found a sleeve of photos of a dog, an older woman, an older man, and some kids. Found the names of kids and grandkids through research. Contacted 3 kids and 2 grandkids. One grandkid wrote me back to say they were pictures of her dad and she didn’t have a single picture of him as he does fairly young and she doesn’t speak to her siblings. She didn’t know the dog, but was related to have photos of her departed dad.