Only speaking for Austin, but the concerts have been going on downtown for decades, and 90% of the downtown population has moved there in the last 10-15 years. They knew what they were getting into, in fact the main point they moved there was for the activity and electricity associated with all the downtown goings-on, yet now they're complaining about the noise.
Reminds me of people that move close to the airport because of cheaper housing, and then complain about the noise.