That's generally the case when you inject intelligence, such as insuring that only 1 card is discarded/replaced...knowing that your desired result will be found after enough single events.
But that does **NOT** mean that "Every possible change occured."
For your poker hand of 5 cards, each with one of 4 different suits, you would have 5^4 possible changes/combinations. Intelligently, you could limit such changes to 5*3 (or less - perhaps down to 4), but an unthinking, unbiased, random system would have no such option.