Ds doesn’t particularly enjoy wearing a mask but compared to being in pain for a year, guess what he prefers. (It’s the mask.)
I'm so sorry your son has suffered so badly SomeKindOfFloppyWeirdo
Of course there will be some children who are badly affected, the issues of long covid and PIMS are now well known. The greater the number of cases, the larger the number of previously healthy children who will be badly affected in this way. In places where covid is out of control (e.g. Brazil) the number of child deaths is not insignificant - it's not that children are more at risk it's just that more virus circulating means more infections and more children very ill. It seems a no-brainer to wear a mask for a short period (it's not going to be forever) which is hardly a true hardship to protect those children, even if you don't give a stuff about the adults they come into contact with.
But some people really don't care, that's the only conclusion I have.
Interestingly, the children I know seem to be much keener to wear masks to protect others than many adults. As a group, they seem much more altruistic to me.
This unscientific opposition to masks seems entirely adult-led.