This misses the point that gaining a relationship and keeping a relationship are not at all the same. It also misses the possibility of having a bad relationship, and while a bad parent-child relationship is usually on the parent, it isn't always. It's also one of the few (possibly the only) relationship that you can't really bail out of no matter how bad it gets.
Case in point, you ask what the value of peoples close relationships are, but for some people those relationships you mentioned: mom, spouse, pet, actually have negative value.
Case in point, you ask what the value of peoples close relationships are, but for some people those relationships you mentioned: mom, spouse, pet, actually have negative value.