When the baby cries we have to fix it by plugging up the crying. We have to stop the crying. Pacifiers came when bottles came. You can't give the baby a bottle all of the time. So you have to use a pacifier because the baby needs to suck more than the bottle allows.
Pacifiers have nothing to do with breastfeeding.
When the baby cries the baby should be on the breast, the baby should be nursed day and night. The milk is not regulated, quantified and timed. All you have to do is listen to the baby. And the mother has to take a lot of mental energy to figure it out. It makes life very complicated.