Calls take time to master, and some will never take the time to master them, unlike a decoy that takes 5 seconds to set up and deer hunt over. Calls definitely tip the odds in a hunters favor during SOME of the spring mating season, but by far, they are not a 100% death sentence to the majority of mature gobblers like strutting decoys are. I can assure you, and anyone else that wants to listen, that the turkey population will NEVER be in jeopardy because of hunters, like you and I, just using calls. Simply stated, calls are just not "instantly" effective like a decoy, especially on the dominant 3+ year old birds, that do most of the breeding.