Talking at shows doesn't really work. If you're able to carry a conversation, chances are you are being rude to the people trying to listen.
There are many ways that a concert can go wrong outside of the performer's control. All of these have happened to me:
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Bad audio engineers. Too loud. Poor EQ.
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Venue sold too many tickets and it's too crowded to dance or even stand comfortably.
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Incompetent management results in poor logistics. E.g. long lines making people miss the show.
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Venue itself just has poor acoustics that can't be fixed.
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Crowd has assholes. People putting their phones up to record the whole time blocking your view. People shoving their way to the front. People not understanding how to behave in a mosh pit and hurting someone. People doing so much DMT that you can't breathe without smelling it.
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Venue failing to provide free water.
Don't let that sour you on concerts though. I've been to way more good shows than bad ones. Usually if you find a good venue, it will stay good. Some performers are even so professional that they eliminate all possibility of the aforementioned issues by having their own staff take care of everything.