Do you have children? A serious question, because I cannot imagine how someone who has children in the school system can possibly ask such question.
Schools should teach reading and writing and maths (not just arithmetic either, but actual maths - that's another story). These things can to an extent be tested - though two of my children suffer severe dyslexia and will always score low on both of the former metrics. Should the teacher be penalised for this? Should they?
They should also teach how to be a good student, how to resolve issues that arise in the classroom or the playground, how to not be a bully, how to deal with a bully should they encounter one, how to deal with authority figures other than their parents, how to play sports, how to cope with losing at sports, and to graciously win, how to play music, or draw, or paint, or make animations, or whatever creative outlet gives them the most fulfilment.
Seems to me that the things that cannot be tested far outnumber the things that can.