Why is betel nut not banned?

Although betel nut causes cancer, it cannot be equated with drugs.

Betel nut is a kind of food culture. Although it is addictive, it is not as inescapable as drugs. Moreover, not everyone who eats it will eventually develop cancer, just like smoking. Not everyone who smokes will develop lung cancer. People can also quit their dependence on betel nut in the same way as quitting smoking, and it all depends on their own control.