I've dealt with the personally, losing my younger brother to substance abuse.
I have to take issue with this statement, which I think is about 50% wrong, 50% right:
I respect those who sincerely believe that it works better to treat substance abuse as a disease that is not the victim's fault.
Substance abuse is undoubtedly a disease. However, that doesn't mean Hamilton doesn't have to take responsibility for it, own it. Ultimately it is his fault/responsibility. An addict looks at the situation like this - you have a pill in each hand. You know the pill in the right hand is a vitamin C, you won't get high, but you'll go on a lead a wonderful, normal life. The pill in the left hand is drugs, you know that it is going to destroy your life (usually they aren't even in denial about that!). Knowing it will destroy their life, they take the pill in the left hand. There is no rational thinking going on in this scenario - so its difficult to try and analyze it with your framework. There is no cost/benefit analysis going on in an addicts brain.
I would paint a rosier picture of how this will play out in the clubhouse. Generally speaking, Hamilton did a great job staying sober for a long, time - which bodes well for getting past this. The Rangers just came off a world series, have a tight clubhouse generally. I think they will fully support and help him, this time. Here's an analogy - if your friend is a kleptomaniac, you'll say they need help. If you friend steals from you, he is a thief! The Rangers won't let this slide, but they will give him a break, but next time he's looking at the door.