> Example: children are about the future, friendships are not commitments, parents are a compass, spouse is life insurance. (I am simplifying to make a point.)
If you're simplifying you're missing the point of this. But I suspect you're not just simplifying to make a point, but this is actually what you believe.
Maybe you've never had a really close friendship that you've felt obligated to keep alive. That requires work to fix something about it. It's absolutely a commitment. You can make any level of commitment to anyone. It's not a sexual commitment, but for example how many people have you wronged if you sleep with a friend's spouse? It's not just your own spouse.
You've also wronged your friend in that. And I can tell you, if you have children, that the fallout from that likely means you've wronged your children. The same act functionally affects all of those people in a similarly meaningful way. That makes them all reasonably commitments in the same way that you see marriage as a commitment.
There are pieces of a friendship that you are agreeing to or the friendship will end. That makes it a much weaker contract, but also means it requires a lot more work to keep alive. Parents/family are the opposite of that. Because the contract of parenthood/family is so strong, it's a lot less work to keep that bond well. But you can absolutely fuck it up and cut people loose.