If you look at history, nicotine has been nearly unstoppable. If one cigarette company stops selling them, they will simply cede market share to another. If all stop selling, it would inevitably create a massive black market - there are specific markets that attempt prohibition, you can see what happened historically.
Instead, isn't it rational to be realistic and aim for harm reduction? If Consumers can receive a satisfactory nicotine experience from a product that is going to be far less harmful, isn't that still a net positive?