My daughter insisted I come rescue her at three different rehabs. I did the first time. I had to the second time because the rehab decided she needed more help than they were able to provide. And then the routine started all over at the third rehab. That's when I stopped answering the phone and let go. She stayed. Funny how it worked out.
Bolting from rehab is very common because so many would rather be anywhere else than where they are.