I am addicted to klonopin although I'm in the process of tapering, I'm also still on Suboxone for opiates and I was using strictly Heroin for awhile and I'd much rather withdraw from a H habit than benzos, cold turkey or tapering, opiates withdrawals are more manageable to me.
People who have never been addicted to Heroin don't realize that you don't get high everyday, eventually you are just taking enough to not be sick, that's the shittiest part of being a junkie. If Heroin got me high everytime and I never developed an addiction I'd still use it everychance I get. Believe me, tolerance comes quicker than you'd think with Heroin.
So essentially, if you're dependent on benzos or opiates you run into the same problem, eventually you're taking them just to be normal and if you miss a dose..... well, you'll do just about anything to avoid that once you've experienced true withdrawals from either of these substances.
That being said, there are people who need benzos everyday just like there are people who need opiates everyday for chronic pain, it's a slippery slope. I need/needed the benzos, I started using opiates to get high but eventually I needed them to be normal and function.