if this is a serious question:

it's because politicians bend to pressure from lobbyists and outcry, such that the very idea that a resuable vape means that children can vape pina colada flavored liquids.

There was a federal push during Trump v1 to only allow iqos devices in any stores. The two vape brands (maybe 3) allowed in general in my state are manufactured by... if you guessed RJR and PMI, you are correct. The big tobacco farmers and cig manufacturers.

Reusable vapes with custom or pre-mixed flavors were attacked hard. I still have a couple liters of 100mg/ml nicotine in my freezer, for making custom flavors at home. I don't even know if you can still order nicotine in that ratio anymore in the US.