Because smokers spend an increasing percentage of their income as income levels decrease. This means smokers tend to give up other things before giving uop cigs. In particular, you claim you would give up smoking if you didn't have the cash. That is unussual for a smoker.
Do you have any idea how you sound, when you make one of those pronouncements? Smokers aren't bugs under your personal microscope, so you can study our nasty little habits and make generalizations and edicts. We are children of God, saved by the grace and mercy of Christ, to do His will as He may make it known to us. YOU have no authority here.
You are so offensive. You owe us an apology.