Every day in the US 2000 children under the age of 18 smoke their first cigarette.
It's important to switch those children to vaping or not smoking.
But all those other children who aren't smoking? There's almost no benefit to them from vaping, and there are disadvantages and risks. Vaping costs money, it's potentially addictive, some of the flavours can be harmful, the devices can be low quality and catch fire etc. These might be small quantities of risk, but across a population of 350m people it adds up to a bunch of people harmed for no benefit.
It's important to switch those children to vaping or not smoking.
But all those other children who aren't smoking? There's almost no benefit to them from vaping, and there are disadvantages and risks. Vaping costs money, it's potentially addictive, some of the flavours can be harmful, the devices can be low quality and catch fire etc. These might be small quantities of risk, but across a population of 350m people it adds up to a bunch of people harmed for no benefit.