Earlier quoted context omitted.
> guess how that turned out? My guess is that significantly fewer people use drugs than would have used drugs if they were not banned. > "The Crime Survey for England and Wales (CSEW) estimated that 8.7% of people aged 16 to 59 years (around 2.9 million people) reported using any drug in the last 12 months for the year ending (YE) March 2025; there was no statistically significant change compared with YE March 2024"…
They're pointing out that 2.9 millon people take drugs (extrapolating from the people surveyed), and law says that should be zero. This law will attempt to ban cigarettes. Estimate how many people will buy them and smoke them illegally. The number will not be zero.
Sarcasm aside, if the goal is to reduce consumption, criminalization does work. Repression, though, does come with its own can of worm (an euphemism, yes). It's up to the citizenry and its representatives to decide if the trade-off is worth it.