Everyone has a different level of vulnerability to gambling addiction. And this can be influenced by their original purpose of joining gambling. If their main goal in joining gambling is just to look for fun and more excitement, then it is likely that they will also gamble appropriately. And then there are also those who join gambling with the aim of getting the biggest win because they remember that gambling can multiply the money they bet to make it even bigger, and this is also what makes someone continue gambling until they lose control because they are too focus on winning. Ultimately, this can make someone very susceptible to gambling addiction.
It's true that people do have different vulnerabilities, so get to know yourself before gambling. I might stay away from gambling if I don't have confidence in myself to control myself, but if I can control myself, I will definitely continue the game to gamble, many people want to gamble because they want to get rich quick and see streamers make big money so fast.This was influenced by the streams watched by people. They see that some streamers are able to won 1000x to 120k times of their bet. And people are getting encourage to do this make big money fast thing by gambling on the same platform their favorite streamers are playing. Little that the person knows that it is hard keep winning in gambling let alone the 1k to 120k times of the bet.
Always looking at someone's luck is not right, because gambling has to come from yourself, if you want to gamble, always understand the meaning of losing, because there is always a risk behind gambling, you don't always get profit and money straight away, there are things you need to understand there, namely risk, always gamble with a healthier mindset, let's just say we pay the casino to make a game that makes us happy, don't be interested in getting money and prizes, but focus on our mindset. convince yourself that winnings and money are just bonuses, it will help us not get trapped with gambling addiction. 
I highly agree, people have different levels of luck. Aside from that, chance-based gambling games have different result so one should not think that he can duplicate the amount of winning of other people. Instead, a person should always consider that in gambling the chance of losing is higher since the casino has this thing called an house edge.