How many folks that age do you know? I know several, and they all have some issues from the whole lockdown/quarantine/masking adventure our elites took us all on.
I know 50 year olds that have issues.
Just because YOU personally didn’t have any negative effects (being an eremite prepared some for the isolation) does not mean the problem is not real.
There are children whose language skills were permanently damaged by the masking, for example.
I simply choose not to blindly accept 'expert' studies like this that make blanket statements about entire swaths of humanity as though they are all the same little cans of sliced carrots sitting neatly on a supermarket shelf to be inventoried. They cannot possibly create an accurate measurement of such a large group of people from such a ridiculously small sample.
You saying I had no personal effects from the scourge of COVID actually is, however, presumptuous, as is your assumption of my religious beliefs and social habits. You don't know me.
As to how many people that age I know, I am a father blessed with a 'quiver full of arrows', all of whom are that age, along with all of their friends, steadies and future spouses, along with many of the young employees I manage. None of them have any issues from the China virus 'adventure' with the exception that most have developed a severe case of Critical Thinking accompanied by a spreading rash of Government Distrust.
Shall you and I call it a wash then and say that, through our statistical study just now, it appears there is a 50% affected rate versus their stated 70%?