The difference it makes is measurable, but there are lots of other factors. On a macro scale, it absolutely makes sense to encourage breastfeeding, but mothers who can't or don't want to nurse can feel a lot of pressure and shame about it. Nursing feels like a big decision, but on an individual scale the only thing that's important is: is the baby getting their nutritional needs met. And formula does that just fine.
The difference it makes is measurable, but there are lots of other factors. On a macro scale, it absolutely makes sense to encourage breastfeeding, but mothers who can't or don't want to nurse can feel a lot of pressure and shame about it. Nursing feels like a big decision, but on an individual scale the only thing that's important is: is the baby getting their nutritional needs met. And formula does that just fine.