What if there was a legit gambling school that teach responsible gambling for maximum benefit in nearly every country that have gambling citizens, will it help to make gambling a profitable career or investment for potential new and old time gamblers?
Also, will the study or reading of books on gambling theories and strategies help to brush up one's understanding of how games are won, more than videos and podcasts would?
Going to school or enrolling in a syllabus to learn about gambling or casinos is by no means helpful in pursuing a career in gambling. There is no need to provide any educational qualification or qualification on gambling as there is no sure future to build a career on gambling. No regular income is possible from gambling so no conscious person is interested in building a career on gambling. Gambling does not require any academic education as it is not possible to build a career on gambling.
the concept OP is proposing is not about certifying that one has learned the art of gambling and that he can apply it in a chosen field. It's more about having it in the school curriculum such that people get to learn and know some basics things about gambling right from school since it's now one of the thing we're sure youths normally engage in. For that, I wouldn't say it's wrong to think towards that directed since regardless of your inclusion or removing of it from the schooling curriculum, people will still gamble. If it's to be included in the school curriculum or thought in school, it's best to just talk more of responsible gambling and guide people into learning the best approach to be adopted so as not to get addicted.