Right now, regardless of that map, I daresay that the definition of "open" is actually somewhat different from state to state, not to mention local jurisdictions within the individual states, so that what appears on some chart is probably rather misleading when it comes right down to how residents in a given community do, can and will conduct their lives.
That said, sure, over the last two months or so the emphasis has been on the more heavily-populated areas, which not surprisingly have indeed reported higher levels of identified illnesses, hospitalizations and deaths. Scary stuff, especially for those who live within those "hot zones." This virus doesn't discriminate when it comes to snagging new hosts. One can be a multimillionaire and fall ill, or one can be a single mother trying to support her family by working at a low-paying retail job who falls ill.....
IMHO that does not mean that those who live in less-populated areas can run about sans mask and sans taking any precautions, greeting and meeting friends just as in the old days, as it is more than likely if they are doing so, that somewhere along the line the all-too-sneaky, non-discriminating virus will find itself a new home, a new host, in a human body or two and then spread, and yeah, this blithe disregarding of precautions and such may very well be something that swings back to solidly smack the folks seeking sociability right in the face, the lungs or the gut to the point where they find themselves in a hospital bed struggling for breath, trying to hang on to life. Then that state or region will find itself once again under lockdown since there has been a fresh surge of the virus. Surprise, surprise?! No......
As for me, I'm living in one of those "hot zones" and so restrictions have not let up for us at all now, even though they are about to be or just have been loosened for the rest of the residents in other (rural) parts of my state. Fine with me, I will continue to live as I have been, and in many ways there aren't too many differences between my usual wintertime hunkering down and what I am doing now..... This virus has been incredibly destructive and continues to be so, and to my way of thinking, if one wants to continue living and have some quality of life, it is only common sense to at least take what are recommended precautions.