When you buy a cup from Starbucks you typically are only buying a single dose. If you buy a vape cartridge, you have dozens of doses. It's much harder to throw the latter away than the former.

Suppose someone bought a car, and found out that the car vents were spewing somewhat toxic that has a slight chance to kill them. If they needed to go to work in it to put food on the table, can you see how someone might say they had no choice but to use it?

Now take that logic and apply it to a vape cartridge. Say someone bought that cartridge which carries so many doses, along with paying the cost of the physical vape machine and the cost of electrically charging the machine, and spent the necessary time and emotional cost to wait for the machine to do so. Then they find it out it may be toxic. Is it really a realistic choice to take the financial and emotional burden of throwing away the cartridge, if it provides a needed soothing relief to their mind?