Is it realistic for you to win large amounts from gambling? I think this is difficult unless you burn a lot of money on gambling then big wins are possible but that is not entirely true because we know that gambling costs more money than winning.
Someone can even burn a lot of money in gambling and still end up not winning as much money in gambling as they have thought of accomplishing.
One thing about gambling is that it doesn't know whether you gamble day or night without stopping. It can decide to favor you based on your luck, not because of how long you have to spend money on it or already spent. That aspect of luck in gambling can go to anybody, even people who are new to gambling.
Luck in gambling is the main role, not how long we play and place bets there or how long we have known about the gambling.
You are right, that new people can get lucky by winning gambling. It just depends on the time, whether they want to stop and enjoy the luck or continue, and it is not certain that until the winnings run out they will get lucky again.
So if gambling because getting rich it is very difficult to expect, but if rich people gamble because it is for fun, it is very natural to do it.