TM itself can fuck off, but a ticket supplier is providing a service, and transferring tickets is part of that service. Unless the seller is literally just handing physical tickets off to a buyer, the mediating service is using resources to facilitate the transfer, which costs them money.

Look, I hate Ticketmaster too. But there’s an infrastructure cost. I started with a percentage fee, but that leads to incentive for higher resale values. A nominal transaction flat fee not to exceed $1.00 would make sense