As opposed to when most tickets were bought by scalpers, in which case... mostly rich people got to see Beyoncé live.

Certainly a few people occasionally got lucky, but I guess what I'm wondering is, is "band members and managers earn more of the money they bring in" actually a bad thing? Won't this lead to more performers joining the field, long term, and more options for listening to music?

Seems like a good thing to me.

Artists can use some of the increased profit from higher ticket prices to buy and reserve tickets to be given to fans for free via a fan-lottery system.

That’s exactly the problem; the only group that ends up earning more in this case is Ticketmaster, not bands or managers.