"Labor" and "work" and "effort" do not make something a "job". I don't understand why this is so hard for people to grasp.
Webster's: "a specific task as done for an agreed price. a post of employment; full-time or part-time position."
A job is a renumerative position, not a chosen relationship involving effort.
Ones "occupation" is not everything and anything that occupies one's time. I am single. Is cleaning my apartment my job? Is making sure my mother is well cared for my job? Is reading before bed my job?
Your job is what you do for MONEY. Period. One can argue the difference between a job and a career. One can certainly suggest that some "stay at home moms" are DOING it for the money. For the shelter. The food. The car. The joys of motherhood (which, as I understand it, FAR outweigh the difficulties).
But, unless a specific sum is discussed, and unless actual money is given in return for one's specific efforts, it is not... a... JOB.
Someone who, while co-raising a child, is the child's primary caregiver (in terms of physical interaction with the child), may be fortunate enough to be able to choose whether or not to GET a job. But, by NOT WORKING and staying at home, this person is... NOT WORKING.
BTW, all the hugging and chasing and story-telling in the world is not going to raise a child if the child does not have someone supplying it with shelter and food and clothes and schooling. But, men are SO "lucky"! Not only do they "get" to pursue their "dream" (working in a factory ten hours a day screwing the tops on bottles, say), but they "get" to come home to a clean house (which they paid for), a hot meal (which they paid for), and, yes, "get" to enjoy time with their children (whom they will also be protecting, keeping healthy and educating to the tune of many hundreds of thousands of dollars and many hundreds of thousands of HOURS put in screwing the tops on bottles).
The men I know well who have children, and are married to women fortunate enough to be able to afford to stay at home and take care of them, are TERRIFIED 24 HOURS A DAY. Terrified they'll be fired, let go, laid off, injured or disabled and will not be ABLE to shelter and feed and keep healthy and educate the children -- and the woman -- they love.
I happen to believe that the best case scenario is a man working and a woman staying at home with the children. Educators seem to agree with me. But, while they both have work to do, they are not both working.
And, if there's anyone who'd be able to explain the distinction, it's a woman who is NOT lucky enough to be able to stay at home and not work. WORKING mothers, in my opinion, and in many if not most instances, have considerably more difficult lives than their husbands.
It occurs to me that a woman who does not have children and does not, by her own choice, work, is a prostitute, which IS a job, but if the woman and the man are married, she's not so much a prostitute as a freeloading bum.
The hardest job in the world? Who knows? But, first, it should probably be one.