My mother in law is obsessed by parenting - she loved it and it completed her. She was a mum in the 80s/early 90s when, in my opinion, things were much less pressured for both parents and kids.
i think she is completely blind to the practical realities her kids and their partners have to deal with now and is very judgemental as a result. In particular, she hassles the stay at home parent for not working (even though she's doing absolutely everything to keep the household running) and the working one for being late to nursery pickups and too tired to play some of the time (even though the mortgage just requires two incomes it's not negotiable).
I don't have kids and a big part of the reason is I think it looks so impossibly hard to do in the rigid framework that modern society has made, at least in the UK. Or am I just a weak and lazy cow?