I think that's the point the parent is making, there's a lot more friction involved, you'd have to get out of your way to get large amount of drugs (amount in one box in the US is just way more than what you'd get in e.g. France).

E.g. the box of aspirin from the supermarket may have 500 pills: https://www.walmart.com/ip/Equate-Pain-Relief-Aspirin-Coated...