I think for a surgeon as an example, quality may be a better metric than time. I'll bet I could conduct an attempted foot surgery way faster than a foot surgeon, but they're likely to conduct successful foot surgeries.
Sure, but no one has found a good metric for actually quantifying quality for surgeons. You can't look at just the rate of positive outcomes because often the best surgeons take on the worst cases that others won't even attempt. And we simply don't have enough reliable data to make proper metric adjustments based on individual patient attributes.