Such huge winnings with minimal investment in the casino are quite rare, so everyone knows about them, many bet small amounts in online casinos in the hope of getting a luck slot with a seven-digit figure or more, so I think these are unique examples of luck, but they are also motivating factors for many gamblers.
indeed, basically playing gambling is betting on luck, and as the OP mentioned are some people who are lucky when they bet with a small minimum and win with big profits.
actually not for motivation, but as an example of confidence when gambling one day will definitely find a big win luck. even if you have to lose more money first