I smoke (trying to quit) and I don't think cigarette manufacturers are doing anything immoral. I enjoy smoking! Why else would I have ever tried it when I knew all the risks?

Nobody is getting tricked, here. People are selling a product that other people want.

Have you read "the easy way to stop smoking"? He makes a great point about the claim that smokers don't actually enjoy it. It's addiction, thinking you enjoy it is a mechanism of avoiding the guilt of the addiction. Or something like that, his argument was much more convincing.

That's akin to saying "you don't actually enjoy eating food, you're just hungry". Addiction and enjoyment are not mutually exclusive.