I think it depends what you want. My Dsis is a teacher and hasn't worked since her first was born 5 years ago - she plans to go back to work soon, but decided on taking 7 years off to have 3 children and enjoy their childhoods, knowing that she would get another job when she went back. She never planned to be a SAHM when her children were in school, but she knew she could put her career on 'hold' for a while and go back in, even if she never made it to Head teacher, it wasn't what she wants.
I am not in the kind of career that has a 'pause' button - I've been on a 7 year training treadmill that cannot be stopped while having DS, and I need to get to a certain place professionally before we can TTC again. I have worked for 10 years to get to this place, professionally, and if I stop now, I lose it all. That's not ideal, but there you go. When you add to that the fact that, because this country doesn't have an NHS, if I don't work then I don't have health insurance, and neither me nor DS can go to the doctor... well, that pretty much made up my mind for me. I went back to work. Sooner than I would have chosen (DS was 6 weeks old, I cried a lot) but in the long term, I always planned to work until I retired, and we can't afford for one parent to stay at home. It takes two incomes to keep our (tiny 2 bed) flat rented and heated, to run our (14 years old) car, and to buy our (cheap, mainly veg) food. Isn't that the way that most people's lives work out? You work so that you have money, not because you love leaving your children at daycare.
However, this "Having said that I can't understand why parents have children and then handover a good proportion of child care to others, " always makes me roll my eyes a bit.
If you send your child to school. you are 'handing over a good proportion of child care to others.' Most people who trot out the "why have kids if you're not going to take care of them?" motto are expecting to hand over a good portion of their child's lives at SOME point, but because it is socially acceptable to do that when the child is 4/5years old, no one in England thinks that is weird. Where I live, it is socially acceptable - and mainly necessary - to do that when the child is 3 months old. (no paid-for maternity leave) - and so no one thinks it is weird.
So much of our expectations about parenting and child care, so much of our "This is wrong! This is right!" is cultural/ geographic.