If it was a national event, then perhaps having one less run. However, In lieu of any compensation for all the time and effort to come early, design and set up the course and make sure the equipment runs for the day, it is a small price to pay to ensure the course is relatively safe and functional. If he did not get to race then why would he bother to come? I guess you could have a different designated individual to volunteer to set up and run a race for one event per year and not get to race that event. You would probably end up not have as many quality events. If there is any small advantage to test driving the course, I think it is a small price to pay for the quality of the events.
Does refusing to go to the gym count as resistance training?