From what I have seen and heard from others, some think it is a "quick fix" and don't think they need to put in the hard work of recovery. I was one of them when AH took it the first time. His DR described it as a "miracle drug."
Now if someone is really ready for recovery, suboxone is very useful.
I am not judging anyone for how they get clean, it's not my place to judge. My AH is back on suboxone but this time is seeing an addiction therapist. That's a positive start but only time will tell how serious he is this time.