I do disagree that there is any evidence that isolation or social distancing has had any impact on the spread. If you compare the graphs of what would have happened if the government did nothing versus the ones that imposed stay-at-home, they are virtually the same. There is no evidence of a flattening of the curve. The flatten the curve theory leaves out the fact that capacity doesn't stay level and goes down as it is used up. At best you would have mirror-image curves where capacity goes negative versus the infection rate peaks until patients pass or recover, freeing up capacity. The curves would be offset based on time of infection until hospitalization.
It is easy to graph that based on public data, but the media nor medical experts will show that as it disputes the advice they are giving. Time will tell of course and the places to watch are CA and FL where people have gone back to the beaches. If CA and FL spike in the next couple weeks, social distancing should continue to be kept in place. If not, then it was never an effective tool to begin with.