If heroin is the most addictive thing for you (like it was for me) consider yourself lucky. Alcoholics, crackheads, meth heads, gamblers all get wayyyyy more fucked up from their addictions. With heroin you get over the sickness and PAWS and then you feel better than you did before the drugs. Coke and meth change people, alcoholics get that brain damage and gamblers go in serious debt.
I have not had a bet in nearly 5 years & it is still a struggle. Two years without a bet & I still craved the dopamine/serotonin release & constantly thought about it. Drugs fucked my life up but gambling destroyed it completely. I don't know anyone who killed themselves over heroin (suicide not accidental OD) but unfortunately I know a number of people who necked up through gambling.
Imagine being able to just walk down the block and buy your drug of choice in a store.. Liquor stores on every corner, people drinking in restaurants, TV shows showing social drinking.. It's got to be fucking hard to stay sober in this world as an alcoholic.
That is how it is in Australia with gambling & drinking. I have 10 gambling venues within a 10 minute walk from my place. As any Aussie knows it is constantly in your face through the media etc. I still struggle to watch football because every few minutes there is an update on the odds for every bet imaginable.
I have never met a gambling addict who has been able to maintain a normal life & business for any reasonable period of time. It just does not happen but I have seen a number of very successful people throw everything away gambling.
In no way am I minimising anyones addiction as I believe each persons battle with addiction is very very personal. I can only offer what I have experienced & seen first hand. That said I know a number of multi addiction people & they all are of the opinion that gambling is the worst because you can hide it well for a long time & the financial damage can be catastrophic to say the least.