Did you not have any desire to do these things? This strikes me as an odd "rule" to have since a lot of people genuinely enjoy these activities. Playing football in high school was one of my favorite parts of the time period, and going to a summer camp legitimately changed my life path. I think these things can be extremely good if the child wants to participate.

I couldnt imagine not letting my own child not do these things if they wanted to.

Yeah me too! I had the occasional swimming lesson once per week or something but other than that, if the weather was good, you'd find me and all the neighborhood kids running around playing tag or riding our bikes everywhere. I grew up at a co-op so all of the houses were close together and there were a lot of families and other kids my age.

I think the number one thing you can do for your kid is to live in a neighborhood with lots of other kids.

I went to art class once a week because I liked it, but stopped at a young age when I didn't se any classes in the course catalog that I was interested in. The only summer camp I did was one week a summer with Scouts.

I'm guessing "summer camp" for most other kids is of a longer duration?

Not everyone grows up in a neighborhood with kids their age.