Auction. Auction is the answer. Or, when a tour is announced, start tickets at 10X the regular price and have it drop down to the regular price over the course of a couple of weeks in a simple time based mechanism. After that, if tickets are not sold out it continues to drop until sold or it hits a reserve price for Door tickets. Good for artists, fair from a market perspective and gets rid of scalpers
I think it's because extracting maximum value from your fans in the short term is not great if you want to have a musical career. The ones ending up with tickets will ideally, for themselves at least, be more or less indifferent to going to the concert: yes, they may get a lot out of it, but they also paid so much it was barely worth it.
Worst case, they will suffer from winner's curse, like auction winners often do: they won the auction because they were the ones who, more than everyone else, overestimated how much they'd get out of the concert.
Can you imagine the crowd mood if half the audience regrets spending so much money, and the other half is largely indifferent?
It's because artists dread this outcome that they hate scalpers, rather than becoming scalpers themselves.