In answer to the title of this thread, as the thread obviously indicates, you are not the only one to feel that way. (Not saying that I do, but I understand the OP's point of view.)
More specifically, with regard to the concern over math abilities, I understand that. I saw students at not a high powered university and am acquainted with students, not all of them by any means, being weak in math. (What really bothered me is that if some of these students were to get a "C" in history, for example, their parents would be all over them. Get a "C" in math and they would say, "I wasn't very good at math either," making the "C" acceptable. Parents in Japan, for example, would not accept that.) I also saw a fair number of home schooled kids. Some of them were excellent in math, but overall... I would put about two thirds of them in the bottom quartile of the students that I saw with regard to math abilities. Yes, the OP has legitimate concern about kids currently being home schooled in math.
Now a few comments. (I am handicapped by what Ken555 mentions, staying away from the political).
A lot of comments seem to suggest that it will be the older people who die. (I know that those who made those comments know better, but ...) Some of those students in class will have a teacher die, a parent die, the father of their best friend die, etc. If we are to talk about mental stress, we need to take that in consideration.
It appears that Iowa has one of the better rates of testing, but that is still poor compared to many other countries. Why? (oops)
With a sudden surge with a complete reopening, there are going to be places where the medical facilities are inadequate. There will also be "survivors" who will have some very disturbing diminished capacities.
The new normal will not be normal no matter what is done.
England tried to tough it out and the results were terrible. They have changed course.
(The next comment is really going to get me in trouble). In the movie, Thelma and Louise one of the characters says "Well, things could be worse." A proper response to that is "When can't you say that?" Still, I think we need to appreciate how very fortunate most of our lives have been. (Yes, I know that this does not apply to all the posters.) So many examples. People who have grown up in slums, with drunken parents who beat their children, third world nations, the English during the Battle of Britain with severe rationing not ending for years after the war, etc. Sorry, when I see some comments, I want to say stop your whining.
So, am I in favor of a continued lock down? No, I see valid arguments on both sides. I am just trying to add content to people's thinking about the issue.