You’re being a bit naive if you think safety didn’t factor into the decision at all, or that any of these people couldn’t be targeted. There are whackos out there who could be targeting anyone for any reason and being on stage is a vulnerable place to be (see dimebag darrel, for example). And if something like that happens, it’s not just the target in danger, but everyone in the vicinity including the entire venue. People are likely to get trampled while fleeing, see just about any active shooter situation with hundreds or thousands of people crammed together.