No band in the World is going to satisfy 100% of their audience - that is complete bull!
As the original poster said, the vast majority of any concert, will be going to see them on that particurlar tour for the 1st time. Their not going to know what set lists they've been playing. Before the internet came along, nobody would know, except the people luckier enough and rich enough to go to every show.
Some people ought to try and live in the real world.