I mean it still does mean that, if you're "actively looking" for something it means that your current state is not good enough.

And I think it's also true for having a kid tbh. If you want a second one, and you actively try for one, and you get disappointed if you're not successful in having a second one, it actually does mean that "one kid is not enough".

That's ok though. It's ok for one kid to not be enough and for one partner not to be enough FOR YOU and the life you want to lead, while they are also perfectly enough in themselves.