Smoking may cause cancer and lung disease which kills smokers over time, but that time period is measured in years and decades.
In contrast, 8 people have died in the last few months from vaping-related illnesses despite most of them being active and healthy only a month or two before their deaths. Another several hundred people are in hospital beds with severe lung diseases related to vaping and many of them could die or never regain function.
At the current rate, vaping would need to go another few decades without a single death just to achieve statistical parity with smoking.