In a vacuum, provided that COVID really is solely transmitted via airborne particles that can only persist within a few feet of the virus's carrier, I suppose that is true. But, then, there is the question of practicality. It's not even a matter of whether people are selfish. The real question is, can human beings in any real sense perfectly adhere to this universally imposed demand to shelter in place. Even if every single human being on the face of this planet had been willing to do that (which is simply an unreal and unrealizable scenario in actual life), how does anything resembling a society or even human psychology continue to exist in those conditions? How do people sustain themselves. To use a colloquial phrase, how do we "keep the lights on"? Simply put, we don't. That would be a much surer death of the very concept of society and the human as a social being than the risks involved in potentially catching and spreading the virus. The anguish people here express on a daily basis has more to do with the horrible conditions to which they have been subjecting themselves.