Almost all my in-person friends nowadays are parents of kids who my kids associate with. Mostly through sports. You get to kill two birds - support your kids and associate with adults. A few you’ll make good bonds with.
Its all fun and games until the kids have a falling out. Then its clear it was very much a friendship of convenience. I always saw them as such but it was a little upsetting for my wife.
But my wife still meets at least monthly with a group of the moms from our first travel team when the kids were in 3rd grade - almost a decade since they were teammates. There was probably some trauma bonding that occurred.