Xenia - you've finally caught up with why re-opening schools without mitigations is a fraught issue which has spawned many threads!
Age is just one of the risk factors.
Those who have recently been shielded were not in that category because of age (none of them, it was medical vulnerability, not age)
They no longer get any employment protection, which is causing a 'risk to my life by disease or by no money' choice for those whose employers cannot offer a Covid safe workplace. This has made headlines, but I don't think that it's an idea that has gained much traction with the public.
Perhaps because it's something that affects 'them' not 'us'?
But as we don't support the exceptionally vulnerable (of all ages) - how are we going to have a hope of extending that support to those whose level of vulnerability is so much less?