
I feel like what OP is lamenting is kind of like the washing machine thing. When we invented washing machines it was expected to save housewives from having to work as hard, but instead it freed them to do other work. Everyone will always work (or parent) as much as they can, but depending on the environment (and technology) the expectations shift.
My parents tried to get me to gain weight my entire life. It led to a pretty bad diet by the time I was living on my own and I only ever gained weight when I ate chicken burgers from meal hall literally every day.
Don’t focus on weight, just make sure he is healthy. It can lead to poor choices and insecurities down the road.
That’s a good point. A significant amount of the freedom that children are lacking comes from how many are run over and killed by cars every year or even the threat of it happening. It’s a legitimate threat to be worried about if you live in suburbia.