As a bedside MICU RN I have at least a baseline proficiency with everything you copied and pasted. It's not secret knowledge and most of the disease states you listed I deal with on and a day to day basis with physicians expecting me to have a firm physiologic understanding of while taking care of their patients.
A general surgeon is not going to remember everything he learned in an ICU rotation. I remember asking one of the younger docs questions about vasopressor and antibiotics coverage post op and contraindications associated with certain antibiotics (with present comorbidities) and he stopped me and laughed while saying, "Dude I just cut you probably have a better grasp of those details than I do." In all honesty he was probably being modest but it really makes sense from his perspective. He is highly trained and proficient in being an attending general surgeon, just because he had an ICU rotation doesn't mean he will retain everything. Physicians also work off of learned experience, do you honestly think an attending will remember everything from his STEP exams? No.
Yeah patient's go to the SICU but there is also usually an intensivist and other consultants working on the same patient. Do you know how hospitals work?
I agree NPs should not replace physicians and the NP education system needs a lot of overhaul but you need to think things through before you post.