Gambling is an addiction, and doesn’t just come down to poor judgement. There’s a short circuiting that occurs in the pleasure centre that we simply haven’t evolved to handle properly. It’s why even if you’re the most seasoned, calm, financially secure and stoic of people, if I told you that you suddenly won $100M with clear proof, you’d almost shit yourself in excitement, your heart would race. None of us are immune to the physiological effects of winning money, by chance or skill.
I’m not saying people getting suckered aren’t ultimately responsible for their actions, but at the same time just like a drug addiction, an objective and problem solving perspective is more productive than just judging that person for simply being weak, stupid, gullible, greedy etc.