Well the point is: it looks like we can go freely but only when we are not in closed spaces without good ventilation (and low humidity).
Studies [1] have shown that "20 percent of Covid-19 cases accounted for 80 percent of transmissions"
And those 20 percent were mostly 'Superspreading events'. We now know almost all those events were inside in bad ventilated areas.
[1] https://www.nytimes.com/2020/06/02/opinion/coronavirus-super...
One way or the other, end game is herd immunity. But when you let it just "go freely" you overshot - more people then is necessary for herd immunity will get sick.