People enjoy concerts for different reasons and in different ways. I don’t see why we should deny them the freedom just because you appreciate events different.
The thing is, when you create a sea of people looking at the concert through their phones, you have already ruined the concert for the people who want to live in the moment and just experience the concert as is. The phone ban is created exactly for that reason: so that people can enjoy the concert without having other people decide for you that the concert is much better enjoyed when 20 phones are blocking your view.