A guide friend of mine likes to say "cameras kill trout".
Absolutely Spence! I'm so glad you brought it up! I've been meaning to for some time. Picture running your ass off to the point of exhaustion from a grizzly bear, but in the end he catches you. He doesn't kill you, though. No, instead he fondles you roughly and as you are still struggling for breath he sticks your head in a barrel of water. The meaner the bear, the longer he keeps you, but he doesn't kill you outright - he just fusses around for awhile, handling you very roughly. When he's finished, he flops your unconscious body on the ground and leaves to go about his business... Now you are in the wilderness with no help, no ER, and no fishing buddy to administer CPR. What are your chances?
Now before the animal rights folks think I'm in support of their propaganda to anthropomorphize animals, trout don't have the brain structure to experience pain the we way we understand it (imagine pulling with all your might away from pressure with a hook in your jaw), nor do they experience emotions like fear or anxiety. But they do experience physiological stress in a similar way and we all have a responsibility as stewards for future generations to handle fish and game responsibly.
There, I've said it and will get off my soap box now. My apologies for preaching to the choir.
Regards,
Kurt