We need herd immunity in order to cover people who cannot take the vaccine -- immunodepressed people, cancer patients on chemotherapy, infants who haven't developed an immune system yet, etc. You need about 95% of people to be vaccinated for herd immunity to prevent the spread. But we're using most of that 5% for medical reasons. But unless you isolate and treat the disease for anyone who gets it, it can get passed onto people who are in the 5%, and continue to spread. Not containing infections is super dumb for any reason, because you waste economic output. Lepers begging on the streets is not the option we want here; problems are very rarely one person's problem alone. As a game theory choice, Nash equilibrium is on the side of disease treatment, mainly because not treating other people can be fatal to you.
The TL;DR is to ask yourself "WWUD?": What would Usagi do? If you're disagreeing with her you're on the wrong side.
The TL;DR is to ask yourself "WWUD?": What would Usagi do? If you're disagreeing with her you're on the wrong side.
"Kitto daijoubu da yo." - Sakura Kinomoto