I would say a well designed game is one where you could put different officials in the same scenario/perspective and the call would be straightforward enough for them to make that at least 9/10 would agree on the call.

This is largely true for fouls in soccer, hockey, basketball, and baseball with a few exceptions.

This is largely not true for many fouls in football. Pass interference, holding, roughing the passer/kicker, completions of catch with controlling possession all the way to the ground are all extremely difficult to call because there is lots going on all at once and it happens quickly with subtle differences like a open palm vs closed palm having meaningful rule implications.