That comment on the FT article is spot on.
It absolutely isnt.
Everyone (or at least almost everyone agrees) that this lockdown cannot continue forever, and that it will have to lift relatively soon. What has to happen before it does is that we get a proper testing regime that can test large numbers of people, a proper contact tracing system (not the anon app mentioned earlier) and we expand the NHS so it can cope with an influx of cases as well as its normal business. This is what most countries are doing now, and what all the currently "successful" countries did - in some cases without having to lock down. It is also not impossible for us to have set up within two months of the lockdown having begun.
On the surface the FT comment could be read as advocating some of that, but the way the poster describes the protecting of the vulnerable (as impossible unless they are going to be sent to medical camps, which is absurd and hasnt been advocated by anyone), the lack of confidence around a vaccine coming along anytime soon and only increasing NHS critical care (which is not going to do much by itself when some reports suggest currently 50% of people who get that far end up dying) strongly suggests that this is basically a call to stop the financial damage first, then worry about the rest.
It is basically the herd immunity strategy again, which apparently doesn't exist.