Basically, you’re saying “we can’t walk and chew gum at the same time.”
Vaping and smoking are two essentially separate health concerns. Why can’t we focus on both at the same time? Are we cognitively impaired as a society and public health apparatus?
The fact that the reduction in smoking usage and lung cancer rates is commendable is not mutually exclusive from having a desire not to grow a whole new form of nicotine addiction in a new generation.
If you look at usage graphs, smoking was already declining, and then vaping exploded in popularity in just the last 4 years or so. Smokers have largely not been replacing their smoking with vaping. The majority of picking up vapes are new users who have never smoked.