Individual details like jump combination difficulty is not subjective; however, the overall view of technical proficiency is, as it requires you to prioritize what aspects of jumping makes one skater more proficient than another. For example, some aspects of jumping are as follows (and in no particular order):
A. Combination difficulty
B. Variety/Quantity
C. Consistency
D. Size
Kim is obviously stronger than Michelle in A and D. Kwan is stronger than Kim in B and C. The subjective aspect is what constitutes greater technical proficiency, and how much greater that proficiency is based off the differing variables.
Kim does not do the loop. But she has more difficult combinations. Which one is more important? Does not focusing on the loop afford Kim the ability to have more difficult combinations due to narrowing her technique to mastering fewer triples? What is more difficult to do, 7 tripes of 5 differing styles or 6 triples of 4 differing styles but in harder combinations? A more extreme example would be who is technically more proficient, Yamaguchi or Harding? Yamaguchi completed far more difficult triple-triple combinations than Harding; however, Harding had every single triple.
Saying that skater A is more technically proficient than skater B because they can land a more difficult jump combination is like saying the Redwood forrest in Northern California is a greater forrest than the Amazon rain forrest in Brazil because it has taller trees; you can't judge an entire concept on just one aspect.
