If they hadent commited a crime yet we could still keep an eye on them so if they did (via the internet for example) we could catch them easier)

There are so many dystopian stories based on this concept. You’re literally advocating for a police state level of monitoring, so that the government knows so much about you that they can suspect you of crimes that haven’t even been committed yet. What happens when investigations start with people flagged for “suspicious” data as determined by black box algorithms that nobody really knows how they handle the data they were trained on.

And drug use is treated as a medical issue in a handful of countries, where instead of making them illegal and pushing them underground, they let people get their heroin tested for purity, get clean needles for free, and shoot up at clinics. It prevents overdoses, ensures vulnerable users are regularly in contact with clinical staff, and makes it easier to help people struggling with addiction. I also fail to see how sex dolls will help catch drug traffickers in a way that would be different from just having everyone’s phones or computers spy on them.