Correct, but we also have no reliable, trustworthy vaccine for it, and in my opinion won't have one for several years. And in this scenario, because of their respective ages Schmoe, Schmoe Jr., HTTD/awar, and HTTD/awar II are likely all extremely low risk for serious effect. While we have collectively repeatedly stepped on our own dick over the past few months, the one thing we are reasonably confident of are the age stratifications and other high risk factors.
So in the absence of a vaccine, isolate the grandparents and morbidly obese and let it ride with everyone else, then you can unisolate the grandparents and fatties faster. It's like when I was a kid and had the chicken pox, neighbors bringing their kids over to get it. You can get to the 60-70% herd immunity pretty fast that way.