The only people who find this joke funny don’t have any children.
You can have humour and children at the same time...
Or people who have a sense of black humor. Never heard dads make dark puns and jokes of similar nature?
The same people downvoting you would be outraged and screenshotting you for a mob on Reddit and private Discord servers if you made similar comments about their pets.
Six kids here, I use the “we needed some backups” joke all the time.