Nope, nope, nope.

Gambling addiction has impacts beyond the person gambling, because we live in a society. They might gamble away their kid's college fund, lose their house, or resort to stealing money from family members. When they take out loans that they default on, it impacts the balls and raises costs for everyone else.

All of these are very similar to secondary and societal effects of hard drug addiction. It should at the very least be regulated. And most being is worthless from an information standpoint, so isn't providing any societal upside - a man doesn't hurt us. The world was strictly better before we had rampant gambling everywhere.