I used to believe that. With the legalization of all the sports betting and how fast it can drain a gambler which can then affect the gambler's family, I'm now pretty much on the other side of the fence.
Just like we banned public smoking because of the effects of secondhand smoke, I'm pretty convinced that the secondary effects of gambling means it needs to go back to being banned. I don't see an obvious way to legislate gambling to prevent the auxiliary victims. It doesn't help that getting maximum profit as a bookie means being part of a group of the scummiest people on the planet who will stoop to anything to drain people of their money as fast as possible.