Yes, I believe in that and I avoid betting in most sports events because I find no value in those. I only bet on the games where I'm pretty sure that chance of winning is higher for me. I never bet on those games where it only would work for me based on my luck and no analysis. So it's better to avoid betting on such games and only bet on the games where you're sure that chance of winning is higher.
You speak as those there were ever a game that's not dependent on luck but solely on your skills, knowledge and experience. Every game I know, as long as it has to do with gambling is based on luck, I'm not saying that a gamblers expertise are not required, I'm simply of the opinion that, while a gambler's skills and expertise to analyze the game effectively os also very important, i strongly believe that luck is the principal thing there. Because regardless of how good you are with your predictions or your analytical skills, the fact still remains that you may never be able to accurately predict the future, hence you need luck to make your predictions accurate and for you to win.