IMO nothing touches opiates as far as addiction potential goes. That shit becomes as important as food, water, and sex to an opiate hijacked brain.
Still, yes I think they should be completely legal. Legalizing these drugs would completely destroy the black market for these drugs and greatly mitigate deaths from shit like fentanyl and carfentanyl.
Well, that's how people usually discuss policy, not an absolute thing but quantitative. Is enjoyment people get from a particular extreme sport worth preventable injuries and death? Is enjoyment people get from not wearing the helmet worth the death? I'd say no to the second question...
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I dunno, my knowledge of those particular sports is limited so I'm not necessarily convinced they shouldn't be banned or a least heavily regulated. They are at some places.
Next thing we know people we'll come up with a pricey "riding without helmet" licence that requires people to prove they are an expert bike person or something. I don't really care as long as it decreases the incidence.