And unfortunately social interaction is severely restricted and punished in K-12 education (in the US, which is the extent of my familiarity).

I volunteered at an elementary school for a year, and the kids there had little opportunity to socialize freely. Recess and lunch were limited to a combined 40 minutes, including transition periods to and from the classroom. Gym/physical education was a "unit", only attended one week out of every three, and much like I remembered from my own schooling, more than half of that time is spent explaining the rules to some highly-structured, barely-constitutes-exercise activity.