Once I watched a movie, in which the leading couple opted not to have kids at all. They were of the opinion that kids are not for them, even though they like kids.
And in that movie, they come across a couple who have tried and failed to have kids and looking for surrogacy. When they start a conversation, it turns ugly when the childless parents realize that the other couple chose to have no kids voluntarily with no medical restriction.

Is that a good thing to judge a couple who don't want to have kids? Is that a mortal sin to make their choice?
What's your POV?