I grew up with my grandpa fly fishing....by himself.
He raised 4 boys and three girls. He went to Roaring River every spring for twe weeks to be by himself I guess. Always wanted to learn, but oh well. I got to bass fish with him a lot though.
My wife and I have been trout fishing for many years, but I've always used spinning gear. Finally decided to take the plunge. Bought some decent gear, but never could master the cast.
Finally hired a guide at on the lower Mountain Fork River in SE Okla. Told him that I didn't care if I ever caught a single trout, but wanted to learn the cast, and presentation.
As soon as we hit the stream, a tremendous thunder storm hit that started getting the water muddy. We kept moving down stream, with him coaching. Caught a few on accident, but I learned from a professional. He was gruff, and not that patient, but when I handed him my gear, and told him I wanted to see him throw it, I was amazed. The problem was me and not my gear.

At the end of the trip, I learned three times more than I ever thought I could. Still a little rough on the cast, as I don't get a lot of practice, but our twice a year trip to Lake Tanneycomo Mo. has turned into a 100% fly fishing trip for trout.

Now I understand why folks like to fly fish.