My wife and I use to be fishing fools. If we weren't working, we were fishing. And, although catching fish is a lot of fun, cleaning them isn't. Scales and slime and a smell that won't wash out of your hands no matter what you do - yuck!
So, catch and release was not only sporting, but fit right into the idea of not having something else to clean when the day was done. Truth be told, it was probably safer NOT to eat the fish we caught in many locations. If you want a real eye-opener, go to the website of your local department of natural resources and read their recommendations on which fish to avoid eating.
Imagine what it must be like for an osprey after catching and eating a fish and feeding their chicks. I have never seen an osprey carry off the remains and neither have I seen any remains beneath a nest, so I assume the left overs just lay in the nest ripening. I watched a fish crow on several occasions hanging out in a nearby tree, hoping to steal the remains of fish from the osprey nest. Fish crows have a very distinctive nasal "caw" which makes them easy to identify.