Perfectly well said, greedoniz.
It is all about the effect - no truer word was said. And sometimes a magician, for one reason or another, chooses to use a difficult series of sleights rather than a simple gaff or gimmick... "it's personal!"
But...! There are a great many instances where half of the latent power of an effect lies in the audience believing no "special apparatus" was used. And that involves examination.
Most of us will have used an ID. It's a miracle maker. But good luck to the person who "sees no need for sleights" when asked to perform a similarly baffling effect with a borrowed deck!
It comes down to being a magician versus buying something clever. With a french drop you could entertain on a desert island... if all your tricks come in packets with a secret trap door, you couldn't, simple as that.
I think of it in the realms of cooking... you could impress guest after guest by heating up 5 star meals and successfully passing them off as your own, but bung two people in a kitchen with some raw ingredients and you'll soon find out who is the real chef!
Likewise, if you claim to be a magician you are saying something about yourself, not just your ability to buy and use "tricks", and you should be prepared in some way to demonstrate that "truth" in almost all circumstances. What would you think if someone collapsed, the shout went up for a doctor and the reply was "yes, but without an MRI scanner I'm totally useless!"
