I am all for harm minimisation...
I was methodone many years ago and same as Deeker, it saved my life...I had no support and only had my desire to get and remain straight, In the time I was on methadone, I changed everything, I arranged to pick up my dose at a pharmacy so I had no contact with other users and also a prescribing doc instead of a clinic, I moved and slowly became employable and further educated and got my self respect back.
I worked hard, I was on a high dose and it took me a few years to reduce but by the time I had my life was unrecognisable from where I had come from...it took approximately 12 to 15 years before I developed a unhealthy appetite for alcohol.
Don't let her rattle you, she only knows what she knows....
Good luck.