Casinos are programmed to always win, if we play longer after some win streaks then there is a high chance the next bets you will have will lose.
No not necessarily. You can keep winning forever. It’s just like you said "it’s all about luck".
The problem is not about whether you will win or lose but
morerather about
what you expect. When you gamble, you should not think about winning or losing because this is not what the aim from gambling. The aim is to have fun and spend some fun times.
Gambling is not an investment, it’s a paid entertainment activity.