Legalizing gambling in a country will definitely be profitable because the state's income will increase from the taxes collected, besides that, people's interest in gambling will definitely decrease because the more free they are, the more bored they become. This is human instinct. Banning gambling in a country for whatever reason will be useless and will be more detrimental to the country.
I agree with you, if a country bans gambling, it is a loss for that country, because if gambling is banned, will gambling be completely and forever eliminated from their country? No, gambling will continue in every country, but if a country legalizes gambling, it is good for them, because I agree with you that through legalization, the state can increase revenue through tax collection, after all, gambling can never be removed from a country, it is impossible, so I think legalizing this issue is beneficial.