Correlation does not equal causation. Why did teen drinking drop? We didn't ban flavored alcohol. It dropped because enforcement went up. Fines were greater for businesses and those who sold to minors. More time was put into ensuring common places of sale were not selling to minors.
Are you seriously making the argument that any flavor outside of tobacco and menthol is targeted at kids? That no adult likes the flavor of funnel cake and fruit? Because I can show you the massive amount of vape shops across the country that sell through flavors quickly and it's not to kids. The mentality of making something taste worse to prevent people from consuming it because you think it's bad is based in prohibition era puritanical thinking. Not to mention it's directly benefitting tobacco companies by keeping people smoking cigarettes.