Surely the point is that the OP and her friend actually discussed the whole FB/photo issue. The OP clearly knew how her friend feels about it.
Whether or not it is realistic to stop anyone else at he wedding uploading the pics to FB is beside the point. It's beside the point because they haven't discussed it with the friend. They would have no idea that she didn't want the pics on FB.
But the OP does know
Her friend quite specifically said "I don't want pics of my daughter on FB.
And then knowing that, you totally ignored that.
You could have cropped the photos. You could have blurred her face. You could have done the decent thing, phoned your friend and said that you really want to share the pics but her dd is in all of them, would it be ok to put them up just this once, without naming it tagging them.
But you didn't.
I agree, you cannot control what other pics random people put on FB and it might be slightly unrealistic to expect that your child will never appear in a pic online.
But if I had a lengthy conversation with one of my friends, and explained why I didn't want pics of my dd online, and a few days later my friend did exactly what I had explained I was unhappy about, without any discussion with me about it, I would be furious.