I am closer to agreeing with you for smoking (though an outright ban is still a step too far for me). But banning vaping feels arbitrary.
If you truly believe that vaping and smoking are equally harmful then I can see why you might want to ban, but I think the evidence is just not there. Vaping has nicotine but no tar, no carbon monoxide, far fewer other harmful substances.
I’m not a doctor but believing that vaping is maybe 20x as harmful as doctors say feels quite anti-science. If they lie to us on something like this then maybe they are lying about vaccines and all sorts of other things too.
The 5% figure has mostly been dropped now but the latest formulation is “a small fraction of the risk of smoking”.