Those are just few of the diseases that you can get with smoking plus the other factors. Without those other factors, smoking cannot come up with a disease, its like, smoking is a pre-requisite to a disease but not merely the root cause of such disease.
Just like having a piece of a giant jigsaw puzzle.
But if there are many disadvantages of smoking, there will always be an advantage in smoking. Here are 18 benefits of cigarette smoking.