If breastfeeding is good for this child, this gives the mother a reason to breastfeed: it is worthwhile for her to do it.
We treat her as if she has a duty to breastfeed: she has to breastfeed unless she has a good excuse.
But when something is good, this normally only gives me a reason to do it, not a duty.
So the benefits of breastfeeding might give a reason to breastfeed but not a duty to do it.

How we feed our babies matters a lot, but it is a very personal decision. We need to make sure women have all the information and support they need – and then trust them to work out the best thing for themselves and their babies.