Had they made reusable vapes legal this wouldn’t have been an issue.
For kids, they're expensive to purchase, expensive to replace when mom/dad take it away, and much harder to conceal from teachers and parents. It's harder to swap flavors and such, too.
Really, the issue is that public officials and police don't care. It took 3-4 years for NYC to start doing something about the thousands of illegal smoke shops.
The overhead of a charging circuit and a refillable or removable chamber is not much.
If they cared about health you'd be able to get Snus too