can't say I understand the bias against gimmick tricks.
Well the problem with gimmicked tricks is well... they're gimmicked. They can't be inspected and (in most cases) you can only use each thing for 1 effect. Just imagine yourself loaded with like 10 different gimmick tricks in your pockets to achieve 10 tricks. And after every trick you have to pull out a new deck or cards or coins or whatever, people will start to get suspicious. When you can carry 1 deck of cards you and do a edited of a lot more. I'm not saying that gimmicks are bad, that’s just normally why people don’t like them. You never want to carry too many gimmicks; some is good but not too many.
Just my 2 cents