As I posted above, with examples given and I could give you a lot more, I don't think that this is a reasonable expectation. Especially when you are talking about most staffs having multiple coaches each with a different level of experience dealing with a complex set of rules. The head coach almost always takes the blame, but in many cases kids and parents may be relying on another staff member (may or may not be the case here, I have no idea).
Wrestlers and their families are best served investing a little time into a subject that they are in complete control of - their weight. Relying on others in this area has proved unreliable, time and time again.
I agree with the rest of your statement.