I'm genuinely confused by what you wrote, as in I don't understand the bulk of it, so if I'm off-base with what I'm saying here, my apologies in advance.
There IS a reason to do something else, and part of advancing in magic is figuring that out. Even someone dedicated to a particular field of magic needs some variety to what they do. You're confusing a magical prop for an actual field of performance.
And see, you might say, "But couldn't you say the same thing about mentalism, then? That's a type of effect, and it's also a field of performance!" But then look at Derren Brown. He reads minds, does card tricks, walks on glass, hammers spikes up his nose, hypnotizes people, predicts the future, and uses funky psychological stuff to create an eerie mind-control like effect. He doesn't just use a swami writer over and over in different ways.
You know how doing just mental magic makes you a mentalist? Or how walking around outside and doing tricks for strangers makes you a street magician? Or how, if you just did stuff with coins, that makes you a coin guy? Do you see the pattern?
I mean, what would you call it?
The good card effects are being choked to death in a sea of mediocrity. Also, you don't have to be "doing something wrong" to be getting tired of card tricks, because, frankly, that's all ANYONE talks about anymore, and that's all you see anyone doing. The market is 80% card magic, and it's all really sub-par. There's no real variety anymore. No one knows to take a random prop and do something weird and cool with it. Look at the 1-on-1's here - there's Cookie Cutter, which is a unique and wicked twist on a standard Russian Roulette routine, and then, choking it to death, are a thousand boring card tricks and unnecessary sleights.
When you ask what type of card tricks he's doing, new street magic stuff, or old classics, that's the point he's making. We're honest to god actually running out of ideas, but we're still trying to milk this for money because it's all teenagers know how to do.
