My one uncle was so addicted to smoking that he, at times, had multiple cigarettes on the go at the same time in various places of his store. This was often referred to as a 'chain smoker'. When God delivered him from smoking, after becoming a Christian, the very next cigarette was a terrible taste and God took away his desire to smoke. One of his biggest sources of income was his cigarette sales but he was convicted to quit selling them. When he did he took much abuse from his customers and even physical abuse. My own father had an addiction to swearing/cursing in most every sentence he spoke. The morning after he was born again he let out one of these curse words and he immediately was convicted and knelt and asked forgiveness. God not only forgave him but gave him the power to not swear again. My mom and older sister were so amazed at what God had also done in his speech. There are many stories of these miraculous 'healings' in our family that I could tell. All sorts of addictions broken by the power of God and healings that confounded the doctors.
I am not against rehab facilities as there are testimonies of how this has helped some people but what seems to be the common trend in many churches today is to first go to medicines and other human deliverance means rather than believing that God still works miraculously to heal and break habits and provide over-coming power to believers.
Imo, when a group of Christians stop following the prayer of faith and the laying on of hands as we read here in James 5:14-16 and start trusting only in other means, they are not reflecting much belief in the power of God. I believe addictions are sicknesses and we are told how a believing church should approach them. When I was younger, this was a very common practise and miracles were anticipated to happen.
In the MB church I attended I only recall hearing of one case where the James 5 process was followed. In my early years in Pentecostalism a small bottle of olive oil was kept handy at church and in homes to follow this process. Don't know today who, if any, still follow the scripture here. Perhaps it has reached a point where the sick person does not ask for this as they don't believe it will do any good or perhaps they feel they are imposing on the elders of the church.Is any sick among you? let him call for the elders of the church; and let them pray over him, anointing him with oil in the name of the Lord: and the prayer of faith shall save the sick, and the Lord shall raise him up; and if he have committed sins, they shall be forgiven him.
This does not always provide the results as stated and some try to figure out why (i.e. a lack of faith, not according to God's will at that time, etc) however, that doesn't negate obeying the scripture. Another scripture says if we ask anything according to His will, He hears us.
Just saying that there is nothing that God cannot do and that includes miraculously healing us from all addictions. I saw it first hand in my own family and in the lives of many others. Even being addicted to arguing with others on a forum.