Worth knowing, but in many cases a person's experience with something amounts to little more than an anecdote.

I experienced a robbery in a restaurant, committed by a black man. Yes it really happened, but I should not generalize very much based on that experience -- or if I do, I need to be able to discern which attributes of the experience are incidental and which are relevant, and to weight one-off experiences differently from deep experience in an area of claimed expertise.