OK, so you would accept less than one person per universe to be tortured for 50 years for everyone to avoid occasional mild discomfort. But that doesn’t answer the question of how far you are willing to take this logic. We haven’t even began to touch serious discomfort like half the population getting menstrual cramps every month, let alone prolonged pain and suffering. Would you send one person per planet for torture? One person per city? One person per family?
The end result of this game is that a significant minority of people are being tortured at any one time so the majority can live lives free of discomfort, pain and suffering. So is your acceptable ratio 1:1,000,000, 1:10?
Some people thrive for decades (including Stephen Hawking) tube fed with nutritionally complete enteral formulas. Semi-annual blood tests pick up any deficiencies, and supplements are added if needed. Several companies make “Soylent”, the one I am familiar with is Abbott Nutrition.