I was writing somebody yesterday about much the same thing. I'm not one of those people who thinks that these drugs are pure evil. There are people who took them that probably should have received a little therapy instead (that would be me). Their (our) lives are probably better (eventually) after getting off these drugs. But there are people with situations where meditation, breathing, acceptance, distraction, ... simply isn't going to cut it. Chronic pain might well be one of those areas. I totally agree that chronic pain and depression can go hand-in-hand.
I guess I'd want to know if there's a 'safer' approach to managing the pain and see if the depression lifts. Kind of sounds like you're thinking of attacking this from the opposite side - lift the depression and see if the pain lifts.
I agree with you that life is too short. However you choose to deal with this, I hope it works for you.