I think what he says is worth considering. We have a population of, I believe, around 68 million people. During the Spanish flu epidemic around 250,000 people died in the UK - bearing in mind that our population was very much smaller then. It is said that people could feel ill in the morning and be dead by the evening. This current virus is very serious but not as serious as that.
The devastation that will be caused if everything stops until, say, July (or later) may well bring problems - including deaths and illnesses from different causes - that may not be so obvious but equally damaging and much longer lasting.
However, if we just carried on as normal it appears it would mean there would definitely only be enough resources to help some, but not all,of the people admitted with the virus. That in turn would mean that doctors would, on a regular basis, have to make decisions as to who should be treated. It would place an intolerable burden on doctors and health workers (impacting on their own health) - and in all likelihood it would be older people who would not get access to treatment.
A prolonged period of distancing may have catastrophic effects. Some children may be very adversely affected by missing out on school. Not every child's home situation is a good one. There will also be huge pressures on relationships, particularly these days when modern houses and flats are much smaller than in the past. Some adults - and children - are very likely to become less physically and mentally healthy. Added to that, issues of how to manage and pay back debt will place even further strain on society. Perhaps there could be negotiated some sort of "economic re-set button" whereby all debts are written off but instead of money being the means of organising the production and exchange of goods, it has become a product which can be bought and sold and gambled with.
Testing is the main issue. Once we know who has, has had or has not had the virus some sort of normality can be established. After a few more weeks of semi-lockdown, it seems to me that it makes more sense for healthy adults and children to return to work/school (that is why testing is the key) and for people with significant underlying health issues and very elderly people to stay at home, with very limited outside contact, until the danger of infection subsides.