Well, a sprint is a contract - people are not allowed to change the deal in the middle and if they are then the PO isn't doing their job. They're really there

Well, a sprint is a contract - people are not allowed to change the deal in the middle and if they are then the PO isn't doing their job. They're really there to defend the team from pesky customers and prioritise work so that you DO have peace and quiet. I get that this often doesn't work because individuals don't really grasp their function properly and don't defend or don't prioritise and then that part of the scheme cannot work. Sometimes the company structure makes the POs too scared to standup. IMO that would be a problem without scrum.