Just because the end user doesn't mind paying higher, doesn't mean a higher price has not been imposed on them.
Look, a scalper wouldn't command the prices they did if the demand wasn't there.
In reality, whether we like it or not, the scalper is actually facilitating price discovery. It's very clear that these tickets are worth more to people than their face value, as otherwise the scalpers would be unsuccessful.
All the scalper is doing is raising the price to what the market will bear.
Which is why this isn't about economics. It really is strictly about fairness, which is entirely orthogonal.
I'm not talking about fairness or economics, I'm talking about greed, and how a person inserts themselves into a process solely because they want money. A middleman who adds no additional value to anyone but themselves.
Today's reality: A guy discovers a band he likes is playing in town in 10 days, hops on to stubhub, and buys a ticket at 300% markup.
Your fantasy world where scalpers magically disappear: A guy discovers a band he likes is playing in town in 10 days, hops on to Ticketmaster and buys a ticket at msrp.
Actual reality if scalpers magically disappeared and prices stayed the same: A guy finds out a band he likes is playing in town in ten days and tries to buy a ticket, but he finds out that the entire concert sold out 5 months ago and he is just shit out of luck.
You may believe that a scalper holding a ticket hostage for a higher price adds no value, but the mere fact that you buy from them at all is a testament to the value they created: they held on to a ticket that you were too fucking slow to buy, and kept it out of reach to all the people who were poorer than you, and did so long enough for you to realize that the concert existed and you wanted to buy a ticket to it. And you begrudgingly admitted that that value was worth the markup you paid the minute you consented to buying it.