Maybe their goal is good, namely to be able to get money quickly and a lot from a game, but actually gambling cannot be used by them as the main source of income.
Yes, those who dare to bet large amounts of up to hundreds to thousands of dollars are rich gamblers who really have the goal of being able to win large numbers, but at least they are really rich people so that when they lose they don't feel a big loss.
I doubt that rich people that lose big money doesnt feel it since they are betting in proportion with their total bank roll which means the money they lose is still significant like plebs with 10$ bank roll lose 1$ in a single bet.
All gamblers goal is to have a profit. We just vary on our game plan to do it but we are playing to win and have fun. Its just happened that all games in gambling is designed for casino advantage so we are always lose compared to win.