"On the otherhand I could stay at home and turn into a narrowminded bitter old hag like my MIL who has never done a days work in her life having raised 4 children." (my bold)
Raising children isn't work, then?
The original point was about leaving small babies in nursery for long hours, five days a week, not about using a cm or a nanny, or using nurseries part-time, or using nurseries for older children. Why are people so defensive?
(It's ok, that's a rhetorical question, I think I know why. )
I can understand why people put their babies into nurseries for these very, very long hours, but I can't think it's an ideal way to raise an infant.
I did a mixture of things - I was SAHM for the first 6 months or so, while studying at home, and then set up a small business as a bookkeeper, working from home. I was lucky that DS1 slept through the night from six weeks of age.
I had a few clients, but not enough to meet all my costs, so then became a cm because I couldn't afford to pay for childcare but needed to earn more. (It helped that I do like babies and small children.)
I also worked part-time in the evenings and at weekends in any kind of work I could find - in a pub, in a video shop, in a bingo hall, selling Ann Summers at parties and so on. I didn't have a whole day off for nearly two years. When DS2 was 2, I used the experience gained to get a part-time day job which paid quite well, and used a cm. Both boys went to state nursery part-time.
In many ways I had the "best of both worlds" in that I was effectively around most of the time when the boys were tiny while still being able to earn, but there's a difference between "earning" and "having a career with pension etc".