This would make sense if they were an airline and only need to maximise profits. An artist – even one who really wants to make as much money as they can – still needs to think about other things, like atmosphere (that gig with one very rich person won't be much fun), and happy fans. If she sells all tickets at $10k each then maybe she'd clear the market, but she'd piss off a lot of fans, so maybe there won't be as much demand next time.