Answer:
You don't generate an income under the age of 18 that is considered suitable.
Now i'm not going to debate the many 15 year old millionaires out there, i'm merely speaking in a general sense, considering those under 18 receive less wage on average considering they aren't eligible for high paid jobs due to lack of experience and well child slavery prohibitions.
Looks like you're going from 1 argument to the next, instead of backing up your initial ones.
Let me simplify:
15 year old with no income has a few tens, maybe a hundred. Gambles and loses it.
15 year old with a job getting $1.5k a month, much more to gamble with. But if there was a 15 year old with a job, it's them saving for their wants.
You don't learn a lesson from gambling when you have wants and no needs because your parents take care of your needs.
My point is they aren't "wise" enough to make the decision whether to gamble or not, but if it's not costing them hundreds of hours of work, then there's no problem. They learn from experience losing what may be a lot to them, but not much to an adult. When you hit 18, doesn't necessarily have to be 18, you usually look back at your life and the stupid mistakes because you were too stupid to see. We all have done something of that sort.
To think a society that would accept addicting habits to be accepted amongst those who have not completely developed psychologically would be un-ethical.
Addicting habits where they don't have much to lose? Anyone on Sythe that is 15 is provided with shelter and food. It's not like they're gambling next month's rent, or this month's electricity bill away. If anything, it would be their lunch money where they'd suffer. Not much suffering, but enough to learn a lesson eventually. They'd gamble away the need for a single meal.
In the end it's their choice, they can gamble in school, they can gamble with their siblings, or on the internet. Their parents may or may not approve, but who are we to stop them? It's the internet.
I'll give you something to think about for your next post. Why are you against underage gambling? A teen could gamble with friends in school, at their house, when they hang out, pretty much anywhere as long as they hold cash. They don't pay for their needs. So they gamble away their wants, it's a risk they take. The difference between wants and needs to a teen and an adult on Sythe aren't the same.
I haven't seen a proper response from you except pointing out that places have age limits. All I see is comparison with something completely unrelated, which you choose to relate to because they have an age limit on them as well.