I think parents can moan about it, because when they've done a full days work they don't get to go home and throw themselves into the sofa with their feet up for the eve.
The expectation is that you do everything and have DC and still do everything!
It can by physically exhausting with young ones, and mentally challengng, and not having timeout at all,like you get at work,where you can completely stop and have a proper break where there's no demand on you.
Having total responsiblility for a fragile little life trying to make sure they thrive and spending the rest of your life worrying about them and remaining on call 247for whatever emergencies crop up.
Adored the babies, toddlers and childhood, adolescence,like pp said, totally other ball game, especially with stalking and sexting and internet porn and creepy paeds on line. So much completely open to abuse now, its growing and growing and girls getting taken advantage of with nude pics being circulated and receiving penis pics!!
Hard work!