Basically, would you rather bet on the same thing again and again then regret not exploring more or explore different kinds of bets then miss out on a win?
Gambling is meant for fun and it will be very boring if you keep repeating the numbers that you use in gambling without exploring another option. Being unintentional with the numbers you select and exploring other options I believe increases your chances of winning than trying to be rigid and sticking to his fixed set of numbers when there are so many different number combinations that exist in the world. If you're trying to be lucky I guess, I think you will be more lucky when you keep an open mind and make your numbers randomly better than being lucky with a few sets of numbers.