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.
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.
How will a player need luck to win? and where is the luck going to be found? Gambling is based on luck, yes, but when talking about value, it has much to do with games you think you'll be lucky enough to win, due to a deep analysis you've done on both teams, and how strong your instinct is about the game. This summarizes it down to staking on fewer football games, because we cannot have such a strong instinct on multiple matches.