A valid question, and one that could be productive for us to discuss in detail. Maybe you and I, and maybe Mathman as well, could come to a meeting of the minds. Whether the ISU would pay any attention to our conclusions is another question.
But I would start with the question "How should Performance/Execution, Choreography, and Interpretation be evaluated on a scale of 0 to 10, where 0 is a scared beginner clinging to the boards and 10 is one of the best skaters ever at those particular criteria on a good day, and how should visible errors factor into that evaluation?"
I'm not sure what conclusions we would reach. But I do know that I wouldn't want to go into the process already having predetermined that each single fall should cancel out at least 10% of a very good skater's very good qualities.
(And if so, should a single fall also cancel out 30% or more of a bad skater's good qualities?)