I agree. And this is a topic close to my heart. (And one that's constantly on my mind at the moment)
I'm currently tapering off of a long-term, high-dose regimen of prescription benzodiazepines, which anyone with experience of different drug withdrawal syndromes will tell you is the absolute apex of difficulty. I have a remarkable predisposition towards easy withdrawal, which I discovered after using heaps of different drugs in my teenage years. Strong opioids, ampethamine derivatives, tobacco[1], and even the shortest half-life, highest affinity selective serotonin releasing agents are all trivial compared to benzodiazepines. The amount of excitotoxicity caused by quitting incorrectly can end in permanent brain damage or death.
It's all willpower. It's all about how much desire you have to quit relative to the difficulty of quitting and the ease of continuing. Anyone who can't get off of drugs (which, of course, includes alcohol) just doesn't want it enough.
Alcoholism runs in my family - though I've never had time for it - and it's had a devastating effect on my personal life. I pin 100% of the blame for that on the people responsible for drinking. There's always the option of, y'know, not drinking. Hell, with short-course diazepam, medicine can make the physical withdrawal process a breeze. After that, the only thing left is the psychological attachment to drinking and the need to resist relapse, which is entirely on you (though we even have opioid receptor antagonists to help with that part too). I have no patience for people who claim they "can't" quit drinking.
I'm a research neuroscientist with a keen interest in the kappa/dynorphin system and its modulatory effect on addiction so I'm the opposite of uninformed, but I prefer to draw on real experiences I've had and witnessed firsthand, of which there are many, to give my unempirically verified opinion.
[1] Tobacco's a bit of a bastard too. I quit smoking this year and I'd probably put it a distant second behind benzos for difficulty.