There's a point that people are missing here; if you just agree to do it, then she complains that you didn't produce exactly what she was expecting.
Then you have a bride who has a genuine grievance with the work you've produced. You haven't got a leg to stand on because you've promised to do what she wants.
We've been here before but promising anything is a road to hell. And that's vastly different from a licence to fail to deliver. It just means that if they decide they no longer want to play before you've fulfilled her shot list, she can't sue. What happens if she wants to carry on shooting but the groom wants to go to the bar? You could have signed to accept responsibility for the situation.
It's not a high and might art vs customer service issue at all, it's a sign here to promise delivery of something you have no real control over. And that'd be a stupid thing to do.