Then the working parent never gets a break for themselves? The couple never spends time together alone? (Or only after the kid's bedtime when they're both absolutely exhausted)
Of course some people do this. But it's hard.
So what exactly does the working parent need a "break" from? Surely it's not their kids - as they've been completely absent from their lives during the entire working week.
Is it shocking people may want to do things other than their job and spending time with their children?