Oh, you again. I am not deliberately refusing to understand these basic points, I am pointing out that these basic points, while nice in theory are unworkable in reality. You are making the same mistake that has plagued economics since its inception, trying and failing miserably to make economics more like the hard sciences by incorporating the constant of the "rational man". There is no such thing as this, especially when you are dealing with large numbers of people, history has proved time and again that this concept is ridiculous and that crowds are irrational.
You are treating the doctor, who is close to the top of society in terms of living standards the same as the factory worker near the bottom. You are reducing them both to the same constant because it fits your narrative. You argue that both are the same because their surplus labor is stolen yet the factory worker can't afford a house and the doctor goes home to their luxury apartment to sleep on silk sheets. At least in this scenario, the doctor is relatively well compensated for his skilled labor, in a full communist society the doctor's labor is devalued to the point where it is equal to that of the factory worker.
You keep repeating the nonsense idea that communism is when everyone gets paid the same amount,
I do not keep on repeating this, I fully understand the concept of a communist society in its most evolved form going beyond the need for money. It is essentially the same thing as everyone being paid the same amount because there is no additional compensation for the highly skilled brain surgeon over the street cleaner. "From each according to their ability, to each according to their needs". If this came into place tomorrow I guarantee you that there would be no doctors or dentists left in the country because their skills are in high demand worldwide. There is no point at which their labor is interchangable, the farmer in the field can't just scrub in for surgery after all the doctors leave. In all of our interactions you have never answers this point.