I am an ammy. Sometimes I ride my little pants off. Sometimes I look like I belong in remedial crossrails. Sometimes I ride better than 99% of my competition (hello blue ribbon), sometimes I enjoy watching that jog from the in gate (damn those horses are pretty). ALL of the time I ride better than some pros (names need not be mentioned), ALL of the time I ride worse than some pros (let's start with PJP).
Even if I was the next coming of Margie Goldstein, if I CHOSE to not make a living at riding, then I should be considered an ammy. Granted I'd be an idiot, but let's assume in this dream world I'm independently wealthy, own a 6 horse 4* trailer, a motor home worth more than most people's houses, and have Jorge and Juan to drive everything to the show whilst I fly in and meet fefe my grand prix horse at the gate. If I'm going to dream I'm going to dream big.
As I've said before, the ammy rule is more like ammy guidelines, as the entire thing is self disciplined, self moderated, and self upheld. People who cheat are going to cheat regardless of how many words you add to the rule. Not only that, but every rule is up for interpretation, so you just have to go with your gut, do what you think is right, and protest if you think its wrong.