There's no way it should be normalized when it is going to have some negative implications to the younger people who are also watching the games. These TV channels are paid handsomely for those ads and to see the worse side of it, they display the ads within just a short frame of times simultaneously and you might not even enjoy the game because of how ads continuously interrupts the it. I wouldn't want this to be normalized.
Since children will also be in the stadium, gambling ads should be regulated. They can decide to have a section where children will sit and will not be exposed to the gambling promotions. With the popularity of online gambling monitoring children is now very difficult. So we should set some boundaries that will shield the next generation.