Not sure I agree with that last one.
For me the benefit is two fold. First a day out with nature, and second (with luck) a tasty fish meal.
Does it really matter that you caught dinner with a bobber, an indicator, a synthetic line, or a store bought fly with some new material that fish can't avoid?
Like a previous post by flyguy66 alluded to, take it back a few centuries or more. If you are going to be a purist, be like the bear. Go catch the fish with your hands. After all, using a hook or a net is just plain cheating. Them new fangled spears are pushing the limit of the sport of fishing too you know
--Ron--