A desire to curb the negative impacts of gambling without sacrificing government revenue.  Imagine a society seeking to protect its citizens from gambling addiction while still benefiting from potential tax income.

The point about a partial ban only affecting promotion by individuals is an interesting one.  This creates a loophole where government-sanctioned entities could still advertise, potentially creating a sense of unfairness.  Imagine a situation where some entities can promote gambling freely, while others cannot.

A complete ban on gambling activities, while seemingly effective, might not be realistic or practical.  A more nuanced approach, like stricter regulations on advertising content, consumer protection measures, and responsible gambling initiatives, could be a more effective solution.