If you’re not a medical professional, you will gain quite the knowledge of human anatomy. I’m not talking only about understanding how limbs break, that’s easy. Expect to learn everything there is about ligaments, joints, tendons, and the various ways in which they can be injured.
Whether or not this is a real benefit I have no idea, but I know it has come in handy for me. Plus, you’ll never need to consult anyone on which knee or elbow brace is the best, as you’ll become an expert in the field.