But being a parent doesn’t end when the kid turns 18.

By the time the offspring is 30, parents are free to make decisions for themselves. At that point, many children themselves left miles away and have only sporadic contact due to living independently. Or joimed army. It is absurd to talk about it as if they were 5.

There is be way to become nun or monk without leaving your parents, siblings, friends, literally everyone.

Depends on which monastic order you join. Some are extremely strict.

Completely agree about "abandoning" your adult children.

That was unfortunate type. I wanted to write "no way"

Hm, and I wanted to write "some are strict, some are not". So there is a way to stay in contact with your family, you don't have to join a trappist order!

The part where you live to fulfill their needs does, though.

I would hope there is some middle ground between "live to fulfill their needs" and "seeing them twice in 30 years and never seeing your grandchildren".

I'd argue that fulfilling a child's needs is the bedrock to a more important parental goal — helping your children attain optimism in a world where many people lose.

Being religious is already enough though. Catholics attending mass are least likely to commit suicide amongst other outcomes

It doesn't for many patents. Many people draw meaning from life through their close relationships.