You're really missing the point.

The issue here isn't that top artists can't sell their tickets at a high price. It's that venues have exclusivity deals w/ ticketmaster/livenation and ticketmaster/livenation ultimately charge outrageous fees to consumers no matter what. Then often their own reselling arm is involved in the scalping behavior.

The artists aren't reaping these fees. Ticketmaster/livenation is capturing the entirety of the profit and artists don't really have a choice in using a different ticketing vendor in most cases (since it's common for every major venue in a city to have strong-armed exclusivity contracts w/ ticketmaster/livenation).