You stated that most people lose while only 1 out of a thousand wins, which clearly suggests a luck scenario. When you say I should understand what you mean, it might be more helpful if you clarified your point further.
It's important to note that even with the advantages of past data and analysis, many people still lose money on sports bets. Therefore, I find it hard to believe that luck isn't a factor in gambling. It’s simply impossible to ignore.
What I mean is that yes luck make some people get rich in life. Even few people make it from gambling, betting and lottery. It is all about luck. I mean those people that make fortune from such a thing like gambling and even beyond gambling. But this has make some people go into gambling addiction. I mean I rather not believe in the luck but believe more in money management and not gamble more than I can afford to lose.
Play with the money you can lose doesn't mean luck can't speak within your games. This is where luck even speak most because you won't be fair of sometimes placing bet on underdogs. Most that make fortune from sport betting most times play for fun with money they can lose but luck speaks for them later as they won.