Everybody hates Ticketmaster's fees, but they are simply capitalism at work. The successful capitalist prices his goods and services
not by his costs, but by what customers are willing to pay based on perceived value. (As any seller of software around here should inherently understand.)
Remember that you can, for the majority of venues, bypass Ticketmaster completely by simply going to the box office and buying the tickets in person. Don't want to? Then you're getting what you pay for in the convenience fee. $8 to not travel across the town or state, but instead do your ticket buying while sitting comfy at home, starts to look like a decently reasonable deal.
And that print-at-home fee? Market segmentation writ small. Obviously, print-at-home is more convenient for most customers than waiting for mail delivery. So the successful capitalist can charge more for print-at-home, capturing the revenue from whichever customers are willing to pay it. What costs the industry might incur or save simply don't enter into that question. It's revenue maximizing as all capitalists should strive to do.
Yes, Ticketmaster can do these things because it's a monopoly for any particular event. There is no alternative able to drive down those fees by competing. But this status does not originate with Ticketmaster. Whatever artist you want to see already inherently has a monopoly. Bruce Springsteen already has a monopoly on Bruce Springsteen concerts, because he is Bruce Springsteen and nobody else is. Springsteen and his managers just choose to delegate some of that monopoly power to Ticketmaster.
So yes, everybody hates Ticketmaster, but its practices are really just capitalism and not so different than what companies and startups around here do or would like to.