Addiction in trading is a serious thing and we may not see it in mainstream but, if the exchanges has that option about self exclusion.
Then, it's because they have already foreseen and had complains from the former traders that they're also experiencing addiction.
We shouldn't invalidate someone's real scenario that they are facing. If it's real in gambling, and so in any way that money is involved it's possible that someone is struggling on it and can't control themselves any longer.
Actually trading and gambling are completely different things, even though I don't disagree that a person might also get addicted to trading, but the reason why I say they are different is because in gambling, you basically don't need to spend any time on gaining knowledge, spending time on learning strategies and doing analysis, you don't need to read candlesticks or patterns and then make your predictions based on your knowledge, but what you do in gambling is decide the amount you want to bet and click a button, and boom, you have the result in front of you within a second or less.
For this reason, when people manage to win some money in gambling, they try to achieve that again and again, and when they don't succeed, because it's obviously not possible, then they don't just give up, but their brain keeps telling them that any of the next bets can settle everything down and you will win again, so they keep going. In trading, things don't work like that, you have to spend so much time on it, unless it is someone who treats trading just like gambling.
Almost the same thing, the effects, the mechanics and how we look at it they're almost identical but they're completely two different things and worlds.
It has the same impact that affects our dopamine. We get excited, we get rushed because both possesses reward if we win.
But the frustration out of it is also real when we don't get the results that we want. And so, we overlooked at its effect when we want to win and recovery our money when we're losing in most times.
To be fair, both requires strategy but at the same time you can also play them without it.