There’s an ocean between fraudulent chargebacks eg canceling or refunding your delivery food after it was delivered and purchases in predatory mobile games that were made without an adult in the loop.
It's not obvious to me that your credit card processor should be forced into dispute resolution in lieu of small claims courts... but if they are being asked to serve that function, then it's reasonable to request evidence from the merchant before rendering a decision based on your accusation.
The goods were not delivered and the vendor kept their money anyway. How is this okay?
As the previous comment said, this belongs in small claims court, not chargebacks.
What I'm saying: adjucating these situations is the purview of a justice system (ie courts). If you were ripped off, you can always go after the party that caused damages (ticket issuer). If you want a "short cut" to "justice" provided by a credit card processor, well then they get to decide when & how -- and I don't think it's unreasonable for them to collect "evidence" from both parties to make more-informed decisions. And again, if you dislike their rulings you always have small claims court at your disposal.