So your basis is seeing a guy bridging on his back at your feet, you can tell if both shoulder blades are touching the mat without getting down to mat level?
You didn't give that example in your original post. If a kid is bridged, he probably isn't pinned. And there are a hundred different situations where you might not be able to see a fall from your feet, that's why you do get down to see what's going on.
I think what you probably meant to say was that officials should use good mechanics which includes being down on the mat for near fall situations. The rules book and case book emphasize this very point and say that many near falls/falls are missed because the official is not in position.
No offical should call a fall while on his feet, that too is poor mechanics, whether he can see it from there or not. Get down and slap the mat.
