Doing no sport isn't good. It helps to develop a healthy body. I would however prefer methologies like Feldenkrais or Martial Arts over the standard school curriculum.
Most of the negatives that you list have to do with the way that your parents chose the books. If your parents wouldn't have been fundamental Christians they could have given you much better books.
Martial arts are good for getting some people who aren't interested in usual team sports to enjoy being active, but they're also very bad at getting many people who do enjoy more standard activities to be active. This brings to mind Yvain's experience teaching, where he found that the most effective methods to getting to most students were exactly the ones he'd found boring as a kid.
I've never participated in a Feldenkrais session, but looking it up, it doesn't strike me as something most students would be enthusiastic about either.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.