Doesn't change much, IMO, if it's true. It's so infectious and stealthy, with asymptomatic incubation, that it's going to spread no matter what the hell we do. Get it and get it over with. Protect the very vulnerable until an antibody curative injection hits the market and go on with our lives.
If it's true, it's likely always been true.
Who cares at this point if what has always been true turns out to be something we didn't know already. Aside from stoking more panic in the weak-kneed panic-stricken among us who have spun loose from their moorings weeks ago, who will now go even crazier, unless this changes the mortality rate for the worse I couldn't care less.
In fact, if it's true, there are a lot, lot, LOT, more people infected than we thought and it's likely to push the mortality rate lower, and numbers of those with antibodies higher, thereby getting us out of the woods faster.....