It's a byproduct of regulation. When you start telling people they can't consume this substance, or buy a car with fewer than this number of airbags, or without

It's a byproduct of regulation. When you start telling people they can't consume this substance, or buy a car with fewer than this number of airbags, or without traction control, or you can't sell an apartment with a size smaller than this, you create consequences. Maybe people buy used cars instead of new cars. Maybe they live in illegal units that skirt the regulations not just on sizing, but on fire safety. And so on. You create black markets. This is absolutely not to say that regulation is bad! It is just to point out that it creates unintended consequences you have to be aware of, and place the slider of regulation in the appropriate place. After all, we all intuitively know that a minimum wage of $500/hr and a minimum allowable housing size of 7000sqft won't work! But we also know that telling a surgeon "just use whatever you find lying around" may not be the best approach either.