Another great example of people that have never done it trying to understand it. It's not an apples and oranges comparison. Think of it as learning basketball by yourself or competing against one other guy. If that other guy is better than you then you will get better. Unless of course you are a complete bonehead that cannot or refuses to learn. Competition makes people better. Period. It also turns some people into complete turds. No matter what you do, competition will make you better at whatever it is.
If that's not for you then great. I understand. It's not for me anymore either. But when I did do it I found I real quick that I wasn't any where near the fisherman I thought I was. But that competition made me a better fisherman. A much better fisherman. But I will admit that I took it as a learning opportunity, set goals for myself, and worked my butt off to achieve those goals. Which I did and then I quit.