I don't believe that Gambling helps Bitcoin in anyway , If someone joins the bitcoin community just for gambling then sooner or later he will lose everything and probably leave the community.
People should see Bitcoin from another perspective and not only as a gambling or a Darknet tool.
Gambling is what has made bitcoin popular and there is no denying that because if you look at the statistics there are more bitcoin users using it for gambling then there are for the ones who are using it to purchase goods.
If you think about it about 50% of bitcoin use is in the gambling sector.

It's not surprising and it shouldn't be a surprise to most people that Bitcoin is used a lot in gambling, especially when you consider that it is relatively untraceable if you take the right steps and there isn't any income to be taxed on from gambling winnings. Bitcoin also deposits/withdraws far easier than most fiat casinos, so that's a big thing for some companies as well.