My local club is hosting a CRO seminar in a few months. I have been an RO for a little over 2 years now, and I've come to recognize some of the competition benefits that come from really knowing the rule book. Most of that being "knowing what you can get away with" and "knowing when to argue for a call". I was also able to act as a stage RO for a level 2 match, which I probably won't do again.
That being said, I'm not an MD nor do I really have any interest in performing those kinds of functions. However, I do like to help with stage design from time to time. Knowing that, is there really any benefit for your average serious competitor?