Thank you for your question!
In the last decade, we've learned a lot about newborns and their behaviors - both learned and reflexive.
What we've learned has changed the way lactation consultants talk about "latch." Ten years ago, we may have been quicker to 'stuff' the breast into the mouth, even tug on chins to pull mouths more open.
We understood that babies needed to open wide, but we didn't understand the importance what comes *before* the feeding.