That's why I said you have better odds with stocks than you do at the casino. At the casino the odds are ALWAYS in the casino's favor. Not so with stocks.
The error of your logic is.... if you go to the casino and make a bad bet, you lose 100% and it's immediate. With stocks, if you make a bad bet, it MIGHT go bankrupt "immediately" but that is far from normal.... instead, it will grind down 10%, 20%, 80% and you typically still have some residual value there.
Also, in the stock market, YOU can "be the house" by selling covered calls and or covered puts. Now YOU make the rules.... what underlying asset are YOU going to deal with.....what strike price do YOU choose, what expiration date do YOU want.... the market gives you the value. YOU decide if you want to do it or not. If you do, and you are "wrong" you will end up with a cash asset either way.
Covered call and you're wrong? You end up selling the stock you wanted to sell at the price YOU picked AND you keep the option premium.
Covered call and you're "right" (not called), you keep your stock and you keep the premium
Covered put and you're wrong? You buy the stock you wanted to buy at the price you wanted to pay AND you keep the premium
Covered put and you're "right" (not assigned) you keep the premium free & clear.