Are any kinds of certifications or licenses required to participate in the auto racing you describe? I think that this may be the deliniation between auto and boat racing. There is no requirement of any sailing knowledge or licensure whatsoever.
In our racing, yes, but there are many forms of motorsport that do not require a license. Go to a local dirt track and all you have to do is pay to get in and have a car. Waivers work for them.
The OA/PRO is providing a service that I choose to accept. They practically kill themselves to ensure I as a participant have a good time, and I am extremely grateful for that. I think if I screw it all up, it's my fault and obligation to "make it right".
This is key to this discussion. We all need to help make the OA and PRO folks immune from grief, whatever the situation is.
If we don't like the way an event is run, then don't go back. Or better yet, offer to help.
