Right? LIke, the Titanic story makes sense to me because they knew there was very little chance they could make it to safety. Trying to calm/distract the crowds is a reasonable response in that situation. When you're in a building and there are multiple explosions, staying and playing makes a whole lot less sense than either getting out yourself, or trying to free survivors trapped by debris.
And the State Fair roof blow down in 2011, killing 7 and injuring almost 60 more. Only 11 years later and it appears that the lessons that should have been learned then, have a very short shelf life.
Some years back while installing a moving light system for the hockey team there, a rigger on the job pointed out some remaining debris still in a hard to get to soffit type area from this very incident and filled me in on the story. He didn’t mention that the band played on though…