I expect, to answer the OP, that they do know what things are actually like and have made the decision to opt out for various reasons.
I'm a parent. I'd say most people parent vaguely like me in terms of how they allocate their time and money, but there are a few extremes - one friend is a very, very wealthy single mum, dad isn't on the scene, both kids in private school and the nanny (who's been with them since day dot, more or less) is kept on the books at a very good salary to do drop off, pick up, evenings and holidays. Some people would find it mad to pay I think something like £40k a year to have a nanny doing very limited hours, but you can kind of see how the mum got there - she has plenty of money, next to no time or flexibility, so shelling out makes sense and she knows the nanny can always cover.
Another family has a working dad, SAHM, two kids in FT nursery from a young age. Older one about to start school, will go to after school club five days a week while mum is at home. They have a real issue with the two-ish weeks a year when nursery is shut, because they find their kids overwhelming. I think the mum is actually depressed or otherwise not coping, so their solution is packing both kids off for the maximum time.
Like anything else people make their own bargains really.