Your child playing computer games alone all the time or even tinkering alone all the time because you are too proud will still lack peer contact.

You absolutely can opt out of socialization for both you and your kid. But, that is what you are doing there.

The alternative to helicopter parenting is not just opting out of socializing.

There's also, you know, letting your kid hang out with other kids organically. They do that naturally, you know?

Maybe it is too late to answer now, but anyway.

If other parents expect planned meetups, then "organically" is exactly that. Even if they take no issue random meets in principle, they already planned most time for other things. Their kids are not outside to be randomly met. Often other kids don't even live within walkable distance.

For that matter 3-6 years old don't "organically" start to visit each other alone without parents. How exactly you expect that to happen, really?

I guarantee you will find some other parents that are willing to let their children live like they did growing up.