Not sure what good it would do to not allow the drug user in your example back to the rehab facility. With addiction people can relapse and its probably much harder for them to stay clean than one would think.

Also I kind of disagree with the prospect of 'only I can help myself' because People can help people, sometimes people need help from others...I think this society is too focused on independence. Maybe that sounds stupid but what I mean is there is nothing wrong with people helping each other, but society is so caught up in every individual having to 'get ahead' or be better than the next person and be entirely self sufficient and even narsisstic and greedy about it. It seems like there is no focus on the community and how individuals can make it better as a whole...its just me me me. So I suppose its not so much the observation 'only I can help myself' that bothers me as sometimes that situation can arise but its the philosophy behind that phrase that just irritates me a bit.

Also depending on what problem someone has it may not be as simple as teaching them skills and expecting them to be able to apply them. For instance I'm on the autism spectrum so its hard for me to socialize...I have learned quite a bit about how to do so, but there are still a lot of things I simply can't apply...like i know typically people make eye contact and its seen as weird if you don't but I still can't make proper eye contact. So when you have some kind of mental problem which drug addiction is classified as it can still be hard to implement things you've learned. I mean what if someone ends up in the psych ward because they are suicidal, and they eventually get suicidal again and they are refused re-entry simply because they supposedly learned skills to deal with it the last time? Kind of an extreme example but the point is refusing people treatment on the grounds that they should have skills to overcome their problem probably would not work in the real world.

Also though when it comes to the person in your example, perhaps this facility is not teaching her the skills she needs or aren't doing a good job of it and she'd be better off looking into other facilities....Or maybe she needs more help than she's getting. I mean that does seem like a lot of time in rehab. But at the same time sometimes the goal in those places(I have only been in a psych ward but I have heard impatient drug rehab is quite simular) seems to be to get you out as soon as possible and that can sort of overshadow any treatment you get. places like that just want to stabalize someone till they are fairly safe and then send them back to their lives...maybe that is an issue in how such conditions are treated and people should be encouraged to stay longer till some of their issues are more resolved but that would also require more intensive individualized treatment in such facilities.