Tolerating children is, or should be, one of the signs of a decent society and a mature adult human.
One significant reason for the ban cited by the restaurant's owners was that a waitress was hurt when a careening moppet bumped into her while she was carrying a tray of glasses.
That is indeed distressing and if we lived in a world where drunk adult patrons never collided with wait staff and drenched them in scalding bouillabaisse it would indeed be an argument for such a ban.
But if we're going to start excluding groups from restaurants because they annoy other patrons, children should be just the beginning. There are many categories of diners who regularly spoil other people's enjoyment.
First up, especially in certain parts of Auckland, is The TV "Personality" sweeping into the restaurant in full "Yes – it's me!" mode. They're a safety risk in themselves as they do two circuits of the restaurant to make sure everyone has seen them before they finally sit down.
There's The Connoisseur, who needs to know every detail of every element of every item on the menu before making their selection. Meanwhile, others waiting to have their orders taken must sit by in teeth-grindingly impotent silent fury. Once their order has been taken The Connoisseur is likely to call a waiter back with at least two changes of mind. And they will send at least one course back to the kitchen because it's not right.
There's The Traveller, with a particular request that he or she has had met without question in Hanoi/Paris/Portland and can't believe they can't manage such a simple task here.
There's The Selfie Table, whose members spend most of the evening asking other diners if they wouldn't' mind shifting just for a moment while they take a photo thank you they're sorry to be such a nuisance please don't hate them.
There are The Power Diners who have come out only to talk as loudly as possible about their business triumphs and the great ideas they have going forward and how if these people they're in bed with at the moment can't see sense they're going to take their ideas somewhere else.
There's The Miserable Work Do, where people with nothing in common except the ability to earn a living all doing the same thing are required to socialise for a special occasion which will almost certainly be the fact that one of them is leaving. The general mood of despondency is increased by seething envy at the departee's lucky escape.
You can see why Uber Eats is doing so well.