@IcedPurple
FYI, statistically, single women are happier than married women, though the reverse is true for men. Maybe we should come up with a suitably derogatory word for unwived men?
Although I agree that calling someone a horrid spinster is rude, I seriously doubt that is even remotely true, that single women are generally happier than married women.
The fact that there are constantly multiple millions of women on dating sites, blows THAT comment out of the water. In addition to there being many women 'looking for love,' I know a number of single women who struggle way more financially, than women who are in a couple, and are significantly more stressed, because of lack of money, and lack of support from a partner.
I am not saying married women are better or more superior than singles, but do bog off with the sweeping generalisation that single women are happier than married women - because it's nonsense.
As for the 'mums are more tired than people without children' comment, as has been said, no-one has a monopoly on tiredness. Many people have busy, hectic jobs, and hectic lives, and older parents to look after etc, and just because you have kids, that doesn't automatically make you more stressed or tired.
However, IMO, you are far more likely to be more knackered and frazzled if you have a job (and also have kids,) than you are if you have a job and no kids. Especially as the women with children, will also have the stresses of work and looking after the home and older family members too. (In addition to looking after/raising their children.)
As for mums vs childfree, I agree with a few other posters on here, that there is good and bad on both sides.