Many, many years ago, when my own children were small (pre-school), I became quite friendly with a lady who had two small pre-schoolers, but also two teenage boys, the elder of which had just got into Oxford. I asked her advice on many subjects, but it what she said to me about home-parenting that has stuck with me.
she told me that babies and toddlers can have a good variety of carers, and can bond quite happily with them - however it is during the teenage years that it is most important for a parent to be at home and available to them. When a teenager says 'I need to ask/talk, etc about something'......the worst thing to do is to say something like 'okay, when I have finished peeling the potatoes/sorting out the washing. etc. etc;. That will usually result in slammed doors and no conversation.
She said that perhaps we have it all the wrong way round, good child care should be available outside the home during those pre=school years, but at least one parent should be able to be at home during the early teenage years.
This is relevant to this discussion, I am disappointed (to say the least), as to how condemnatory some of the comments in here have been about this mother (who they do not know at all - except for a couple of lines by her MiL). The child involved seems to be well looked after and happy at their nursery, shame to break their normal routine. he will still be with his parent(s) at weekends, and - on any family holiday planned with both parents.
How many of the wonderful(?) parents on here who were so happy with the time they were able to spend with their pre-schoolers were just as available to them during those teenage years.
I brought up six children, - and did find those words so very true. I was able to be a stay-at-home mum right up to the youngest started Uni. All my four daughters have returned to work after having their children - obviously for money, bus also by choice for their own sakes. Good nurseries have been used, and all my g.children seem to be well adjusted, happy, confident people.
Every family has to adapt to their own needs and circumstances - there is no 'one size fits all' - as long as a child (of all ages) knows they are loved by their parent(s), then all else will fall in place.
Definitely not the place of a g.parent to, in any way, criticise, these sort of parenting decisions taken by their Dil and Son.