A QR code is a link. Who hosts the site? Who is going to pay for the infrastructure, let alone the engineer to set it up? An email has the same problem, what mail server is going to send the email? How do you ensure someone can’t duplicate a ticket? You can’t just make that out of thin air. These systems cost money to create and implement, which is not approachable for individual artists and venues. An NFT takes care of all of that and does it very well at very low cost. Not to mention, the lack of a middle man means all money (besides a small fee to operate on the decentralized network) goes directly to the artists/venue)
I disagree that being able to prove ownership is not a common use case. NFTs aren’t useful in every situation, but when proof of ownership is involved, NFTs are relevant.
Another example of this could be a digital license. Say that you purchased a lifetime license to a piece of software (maybe even a game). You could sell/trade the license to another person on your own terms. I really like this idea because we don’t really “own” any digital goods we purchase now days. If you have a physical game you can sell it to a friend, why not the same for digital ones?
And yes, while they can be stolen, that is not the security they provide. Anything can be stolen. NFTs can’t be forged.
Also want to say thank you for actually asking a question and not just trying to dunk on the whole concept!