That stops being a problem once kids get chickenpox vaccines, and people like me die off. Personally, if the risk of that is to me and my generation, I'm fine with it. I actually do want to leave behind a better, healthier world.
And what is not said in this paper, but is true of EVERY infectious disease, is that the more people who are infected by the wild strain of a disease, the more likely it becomes that that particular virus will mutate into something new. That's right: antivaxxers are potential breeding grounds. If putting an end to chickenpox -- as we eradicated smallpox -- costs us a few geezers like me, I'm willing to accept the risk. And unlike the children of antivaxxers, I'm sufficiently aware of the dangers to make up my mind for myself.
The purpose of vaccines is to reduce risk. If it makes it riskier for a segment of the population, then it is not beneficial. I am not willing to accept the risk.