I'm seriously questioning the absurdity of banning something that remains available a 15-minute drive away, behind a purely informal border. I don't think, for example, that recent abortion bans had reduced the number of abortions in their respective states to zero.
Do different EU member states have different laws? And are EU citizens free to drive across a national border and be subject to those different laws?
I believe the answer to both of those is yes, which leads to my next question, which is, do you think that's also absurd?
California has a huge influence on the American economy. When it makes a law, companies and other states pay attention. The farmers, senators and representatives in my state, Iowa, are still wringing their hands and pulling out their hair over California's law which "unfairly" manipulates the hog market by requiring all pork products sold in California to come from pigs which are humanely treated according to California's definition of humane.
US states aren't as small as you're imagining them to be. Almost everyone in California lives more than 15 minutes away from the nearest state border, and the largest urban areas are 3+ hours away.
You have zero comprehension of the vast scale of America. Do you also believe you can drive to another state and buy guns?
1) For the vast majority of Californians, the nearest state border is 3-5 hours away. 2) those abortion bans have definitely reduced the number of abortions. Not zero, but that's a silly goal for any ban.
Obviously the law is stupid. But states passing their own regulations isn't on its face.