This is what I'm trying to get at. It's not about removing responsibility but rather about seeking treatment options, like we do for any disease, instead of stigmatizing it and saying the patient can think themselves out of it. That last bit minimizes the impact and extent of the disease.
You can't think your way out of cancer, a broken foot, or even a plain old bacterial infection. So why do we think we can do that for addiction?
To your second para, we don't know the root cause until we diagnose it. We don't know if it's physical, psychological (trauma), a hormonal/nutritional deficiency or a combination thereof. Right now society wants people to treat themselves without an adequate diagnosis and that's problematic on multiple fronts.