Private individuals should be able to have the freedom to do what they wish unless there are extreme scenarios. What is an extreme scenario?
An extreme scenario would be extraordinarily high transmissibility and a high death rate among young people. If three percent of children were dying, or five percent of adults, or fifteen percent of seniors, AND the disease was infecting and spreading extremely rapidly, then we could have a government lockdown.
Government lockdowns for anything short of that is a power grab by bureaucrats.