system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Making a product or service illegal only creates a black market which is generally more harmful than what is being made illegal

Making something illegal doesn't make people want it any less, there has only been a deterrent created. Stealing is illegal, but that doesn't mean people don't *want* to steal that new thing that just hit the market or that thing they need but can't afford, it just means that deterrent is more effective than their want of the thing.

Likewise, making a drug illegal does not magically make people not want to do that drug, you've just made a deterrent. A deterrent isn't going to stop a heroin addict from getting his fix and overcoming withdrawal, you've just changed where he gets it from and how much it costs and the risks associated with it. The user now has to go to a sketchy dealer, the dealer has many tiers of other sketchy dealers all the way up to the cartel behind it all, and that cartel is arguably more destructive than the drug itself and so is the "war" against the drug.

Making abortion illegal isn't going to stop women from wanting an abortion, you've just made it much less likely for them to get it done safely. If that woman was raped and she doesn't want to carry a reminder of her attacker, she isn't going to care that some piece of paper says she's not allowed to do that, she's going to find a some shady doctor with a revoked license to do it for her, or she's going to take a coat hanger to herself.

Edit: I am mostly speaking about victim-less crimes. Eg, the aforementioned, possession of weapons, consensual prostitution, and (perhaps most controversially) digital piracy.
gpt
Your statement is generic so can be falsified with any example of something that is illegal and people get it less because of that and isn't more harmful than the banned product itself:  

- Guns in european cities   
- Explosives  
- Slaves  
- Child prostitution  

Making the above legal would create more problems than the current illegal situation.  

You used examples of things that turn our to be highly controversial, like abortion and some drugs, and in this case it has been the case that the ban has been more harmful than the product, however making this situation generic to ALL bans is a wrong extrapolation.