Good point.
The part that I can't understand is why didn't ANYONE in the club try to stop him? Also, how many died an agonizing death by bleeding out because LEA did not enter the club immediately? They waited 3 hours!!!
You don't know that someone didn't try to stop him. I'd imagine in a crowded nightclub with loud dance music, there was a period of several minutes before anyone other than those right next to the shooter realized what was happening. If it was a large place, people on the other end of the building may not have had any idea, until the panic set in with running and screaming.