Except it is not illegal for a 19 yo to own a handgun per federal law. Illegal for one under 21 to purchase one, however.
Besides, Does not NY have safe storage laws?
If cars, alcohol, hammers skateboards etc ad nauseam makers are not liable for product misuse then how can firearm ammo or brick makers a be?
You’re using reason there.
When it comes to excuses to control gun ownership reason does not enter into the equation.