While I suspect the original comment was made somewhat tongue-in-cheek, what it has exposed quite starkly is the difference in attitude to the young and the old.
While effectively losing a year out of your life would be traumatic for any age group, what I do not accept is that it would be worse for the young than the old. The young have the rest of their lives to get over it, the old do not. Yes, the young are suffering from the lack of social contact, but the old suffer even more. It is well recognised that social activities are one of the most important ways of warding off old-age dementia, for example.
In my experience, most young people are fairly resilient. The problem is not the young themselves, but the snowflake parents who are over-protective of their little darlings. When very young, a parent's role is to protect their children from life's dangers. But as they grow up, it should be to teach them that life throws brickbats at you, and to deal with it. Unfortunately these days, many parents remain over-protective for far too long. It is noticeable that most of the furor about this suggestion has come from parents, not the young themselves.
All the fuss about the missed exams, for example, is totally ridiculous. It is not that long ago that there were serious suggestions to abolish exams altogether, and to base grades on performance during the year. In other words, almost exactly what is currently being done now. I knew several in my year group who suffered seriously from exam fear, with one who was physically sick during several exams - he had to retake a number of exams as a result of not being able to complete them the first time around. He would surely have been delighted by the current arrangements.
It is also most peoples' experience that almost nothing they learn at school is of any use at work, bar the basics of maths and english. Most jobs are so specialised that most of what you need to know is taught on-the-job. There are very, very few jobs that you can do straight out of school with no training. All that exams prove is that you are capable of learning a subject. How much of the history, geography, french, english literature, biology, chemistry, etc etc that I was forced to learn at school has been of any use to me as an electrical engineer - zilch. Not that long ago, most children finished their education at 14, so I do not see losing a year or two's education as a major disaster (a far bigger problem is the children being at home is preventing their parents from going to work).
Perhaps the suggestion should have been to put the children and their friends in bubbles, socially-isolated from their families and the rest of society. We could call them boarding schools. Used to be quite popular at one time. And for those worried about their children's future, apparently it is very good for their career prospects.
In most countries, the old are cherished. Unfortunately, in this country, the attitude towards the old stinks. They have had their time, they are no longer productive, they and their pensions are just a burden on society, so lock them away in the cheapest possible way. And it is exactly this that has caused so many deaths. Once the virus gets into one of these stack-them-high budget old-peoples' homes, as inevitably it will, even with the best will in the world there is just no way of stopping it spreading. But who cares - it is the young who matter.
Expecting young people to lock themselves away causes an uproar. Expecting the 50+ to lock themselves away likewise is dropped like a hot potato. But expecting the old to lock themselves away causes barely a murmur, and indeed has been actively proposed by several on other threads. Let the old fend for themselves seems to be a common thread.