Your argument that having nanny in some way interferes with parents bond just doesn’t stack up here. By your own inference the same has to apply to parents that put their child into nursery.
Say a set of parents need childcare to work and they have the means to pick nursery or a nanny for that childcare. Either way, the children are being cared for by somebody else for the same period of time.
So if parents can still love and bond with their child outside of nursery, as you suggest, then of course they can do that outside of the hours the nanny is there. Because the childcare is for the exact same hours - when the parent is working.
The childcare chosen makes no difference to the love and bonding with the parent. In fact, parents that wfh get more hours to love and bond with their child as naturally they will end up seeing and loving the child during their working day ie having lunch with them. They also don’t have the sometimes stressful time of pick up and drop off so can spend more quality time with the child.
What you are suggesting is that the child shouldn’t have a loving bond with anybody else. Most children have loving bonds with more than just their parents, why not their parents, grandparents, aunts and uncles and a nanny - who they consider part of the family too?
Children develop best when they feel loved and safe. The more people that make them feel this way the better.
And there are plenty of baby groups for socialisation.
And no I am not anti vaccines nor pro home school.