I can only speak from my own experience. I have often heard that doctors want to wipe out all childhood diseases because they feel that children suffer when they are sick. In the 1940s and before, there was quarantines of children's homes where there were sick children to confine disease spreads. I remember public health trucks driving up and down the street to remind people to vaccinate their children in the summer time.
Most people feel that chicken pox is an innocuous disease that has few complications, and in the 1980s when my children were young and unvaxed, my neighbors were discussing how this was the very last disease to get a vaccine against it and they were hoping that the vaccine would be available before their children got it. I had already exposed my own children to it and they got the chicken pox before I moved to that neighborhood, so it was not a concern to me.
What did happen was when these neighborhood children got chicken pox, one of the fathers got it also since he did not get it as an adult; he grew up an only child in one of the neighborhoods where there was quarantine. He was also diabetic, so he REALLY suffered, much more than his children did. This happens to a lot of parents when their children get a VPD, who were not exposed as children.
I think there is a purpose to childhood diseases, and it is not nice to fool mother nature.