Why would I tip someone for handing me a shirt? The whole interaction takes like 20 seconds
If you have money for a shirt you can throw them $5. If not don’t get a shirt.
This is a terrible take. People should still support the artist even if they are financially unable to tip.
Or simply unwilling. You paid for a ticket to the show, you're buying merch. If that's not enough, then change the prices and I'll see if they're financially viable for me. But don't play the 'oh it'd be nice if you tipped some extra' game.