A school to learn and to gamble with different strategies and become a professional gambler is not reality because no one can predict the future correctly. It will be a scam if anyone claim to have a school where you can learn gambling and use gambling for a living because gambling is not a skill but you win by chance. This is why I don't believe in people who claim to be gambling experts and gives out game predictions to people.
Not all types of gambling because there are some games that you can use your skills and knowledge to win. Those type of games can be taught in school and people learn to use a working strategy to win. But you are right, gambling generally can and should not be taught in school. Putting too much emphasis on gambling will result to more people being interested in gambling and this will increase the numbers of addicted people we will be getting. There are better things that can be taught to people for them to learn and practice which will improve their life than gambling. Gambling should be for fun and anything that takes it away from being fun should not be encouraged. Most people that will say they can teach you to become a better gambler are lying but they just want to scam you because they can do what they are saying they will do.