I don't think if anything of such would happen. Even if it does, football gambling is not only the sport people patronize, but there are other types of sport and gambling option so surely people will dive into other types of game both online and offline. Just that football is the most popular type of game that everyone is more addicted to, than any other game that's why we feel like we can do without it. But do you also know that before football came into existence there where ways people were doing sports those days which it might not necessarily be football. People can leave the lives without football, but it will only take time to change one thinking about football and look into other sports because one of the characteristics of human being is adaptation. We easily adapt to anything at any given time provided we are thought about it.
Chances of that happening is very slim, football being a form of entertainment also provides job opportunities for both the players and several other people it won't only affect gamblers but the house for a while and a lot of people globally would lose their jobs also with the amount of money generated from football I don't think a country would want to ban it chances of that is very rare. Well if it happen football is not the only sports gamblers bet on, there's still other alternatives like Tennis, basketball and even boxing though it would cause lots of panics in the gambling sector for a while due to the large number of gamblers involved in sports betting especially football, it's been a major form of entertainment and one of the most popular in sports betting so it would really take a while before bettors sport thinking about it, you'll be surprised there would be protests globally for the government to bring back football if it happens.