Smoking introduces a lot more chemicals than just nicotine. A lot of health hazards associated with smoking are from the smoke itself, not the nicotine. Vaping allows you to remove the smoke part of the equation. (Vaping also introduces a bunch of hazards on its own, but it’s still overall better than smoking)
Why/how is it an improvement? They are just moving from one way to consume it to another.
Smoking introduces a lot more chemicals than just nicotine. A lot of health hazards associated with smoking are from the smoke itself, not the nicotine. Vaping allows you to remove the smoke part of the equation. (Vaping also introduces a bunch of hazards on its own, but it’s still overall better than smoking)
Because different ways to consume have different health hazards.