[NamTaf]

Gambling addiction impacts those around the person. They may deprive their dependents of opportunity and care. They may gamble away savings and require further support from the public purse. They may even steal (e.g. taking money from loved ones).

In many non-US countries, we consider the second-order effects due to having inviolable public safety nets. People who are their own victims due to vice are still afforded care because they’re still humans and citizens. That’s why we try to dissuade falling into those vices in the first place.

[Blikkentrekker]

The same can be said for anything that's dangerous. In fact, one can make this argument simply for people who elect to study some field that isn't really very financially viable.