It seems like there are a growing number of people, mostly conservative, who are making this argument, which is essentially that we should call off the shutdown, go back to our normal lives, and let the virus run its course. Apparently some guy on Fox was very explicit about this last night, and Trump watched it and that’s when he sent out the tweet.
IMO, this argument is being made now because we have not yet seen the worst outcome of this virus. Per the medical experts, that will happen when the hospitals are filled with patients needing beds and ventilators and there is no room. It is predicted that this is about to occur within a week or two, possibly even sooner, in most of our larger cities. Once that occurs, I doubt this argument will continue to be pursued, but we’ll see. In the meantime, it would be disastrous IMO for President Trump to publicly suggest, against the advice of the health experts, that we “return to normal”.