I'm one of those people. Even with what's happening now ( I'm in tier three).
I'm ok, my DD and her partner are ok, so far all our families are ok. I'm on a pension and DD works from home, so financially we are ok.
But, of course I'm worried about how we are going to get out of this mess. My mental health is ok, so far. But I also worry about friends and wider family. I feel sad that I cannot see my great niece who was born in September.
But we are in this mess. So we have to accept that. I know that's easy for me to say,but I cannot mentally be depressed when I'm not.
Doesn't mean I don't think those not blessed with good mental health are wrong, I just think I'm lucky.