I feel that anyone who takes or enjoys any recreational substance (including tobacco or alcohol) or has done so in the past has to tread carefully about suggesting any further controls

we have high taxes on the legal drugs, and plenty of reliable health advice. That IMO is quite enough.

Yes people will still die, but the taxes would pay for the costs to NHS were they all ringfenced for this purpose rather than being spent on other things

there is also a mindset amongst some (many?) social conservatives that even US-style increased prohibition and discouragement of even tobacco and alcohol will work provided enough resources are thrown at it

they don’t need to even overtly reduce freedoms, it can be done fairly subtly and is being done (for instance pre-employment lifestyle screening is becoming very good at weeding out drinkers, smokers and plain hedonists)

by denying these people “better” jobs, the power shifts to the puritans

this is already happening in many countries…