I think I do understand machine vision, since I just published a paper using it. If my figure-of-speech does not convince you, I encourage you to step foot in an operating room if you get the occasion. I guarantee 100% that you will be unable to implement a system as efficient as the attending doc. Because numbers are just part of the job. You already see systems advertised as more efficient than anesthesiologists. Until we see those systems tested in a real, usual OR setting (meaning, hopelessly chaotic), you should take those efficiency statements with a grain of salt.