i saw a post here once asking about whether banning gambling will actually solve some problems. well even with gambling deemed illegal, it has not completely disappeared from a country. for example, in north korea gambling is illegal for its citizens.
AFAIK in North Korea, people has no access to global internet and has no access to free market to lunch gambling services or let international companies access the local market. North Korea in the worst example in the gambling industry.
However, for almost all other countries where gambling is illegal, people still find a way to practice gambling in various methods especially after the crypto boom which help everybody worldwide including those who haven't access to international payment services.