They tell others what tends to catch my eye, what I am most likely to observe, and what interests me visually.
They may give hints about the rest of my personna, but not much more.
I learned long ago that you cannot accurately predict anything outside the realm of photography about people, based solely on reviewing their work. You need additional context, and biographical information.
If I have context and additional information and personal experience with a person, exposure to their photography tends to improve the depth and breadth of my understanding of them.