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Dr. Atlas was reasonably straight forward until he reached his suggestions.

Nursing home residents, the highest risk, should be the most straightforward to systematically protect from infected people, given that they already live in confined places with highly restricted entry.

As many have noted many and maybe most of the deaths are in residents of nursing homes and other elder care facilities. Dr. Atlas acknowledges the need for "highly restricted entry" but he doesn't tell us how to do that. Not his job.

The appropriate policy, based on fundamental biology and the evidence already in hand, is to institute a more focused strategy like some outlined in the first place: Strictly protect the known vulnerable, self-isolate the mildly sick and open most workplaces and small businesses with some prudent large-group precautions.

How do you strictly protect the known vulnerable? It is not just those in nursing homes, it is the elderly here, and in every city and town everywhere? It is an attempt to strictly protect the vulnerable that the present policies were put in place. Self-isolating the sick should be done. But as Dr. Atlas reports, the majority of disease spreaders are not sick. So how do you isolate the virus spreading well? He doesn't define prudent, he presents no options for how to strictly isolate, nor how to keep mildly ill almost all of whom will not know they have COVID, and importantly non-ill COVID spreaders away from those of us who are vulnerable to severe illness.

His "Fact 4" is absolutely not a fact. It is his opinion on what might be happening.

Most states and many hospitals abruptly stopped “nonessential” procedures and surgery

That is true. But the conclusion he draws that people are dying because they are not having nonessential procedures belies the meaning of the word nonessential. It is not true that hospitals are not providing care to non-COVID patients. People with chest pain are receiving care. People with stroke symptoms are receiving care. Are there some people hesitant to go to the ER with these symptoms, yes, and there have always been people who die at home because they hesitated. Are there more people hesitating, maybe and perhaps likely, but there is no evidence for that. If cardiologists are doing fewer consults for chest pain that is not the same as saying people with heart attacks are being missed.
Dr Scott W Atlas is a frequent writer on the intersect of politics and health. His Forbes profile shows which political side he supports. It doesn't make him wrong, or right, but it helps to understand the lens with which he comments.
The report linked is from 4/22
Dr Atlas has been tweeting his thoughts about COVID for many weeks. He expressed the same anti-isolation belief
On Mar 13 he tweeted:
1) if no symptoms, you don't need testing
2) no medical reason to broadly close schools
3) old sicker people are the worry, NOT most people
4) if no symptoms, far less likely to be contagious
5) panic fueled by hysterical media non-experts

He also in his Hoover institute tweets, attacks Al Gore, Bernie S, Obama, and Elizabeth Warren, while praising Reagan, Trump, and Thatcher. He is not a neutral observer. Apparently he thought the facts were in by early March.
See his #4? Read that and then this COVID-19 patients most contagious 1 to 2 days before symptoms: Study