Of course it is.
If it were down to each judges discretion where he placed someone then we would have winners getting 8th and 9th placings in their overall score.
Judges have to score to a laid down criteria and place competitors accordingly in order to toe the line and fit in with the other judges.(and stay on the expense gravy train)
What do you think would happen to a judge who placed Heath 10th because he thought his arms were too big?
Its a legitimate gripe about his physique isn't it?
Ok since you brought it up let me explain a bit more about the real judging criteria used.
It is based more of accepted norms and ideals then the actual rule book.
Having bigger arms is almost always a great thing so long as the guy is developed well in the legs , like Heath.
BUT, it is a lot more casual and based on the current ideal look then most will admit.
For example, what look wins today was not what won 40 yrs ago.
Zane was a 3 time Olympia winner ( 77,78,79) ad Yates won it several times in the 90's.
Two very different physique types as Mr O from 2 different eras.