Limiting access to a substance or activity doesn't address the problem, which is the behavior. If the person in question ends up replacing it with a safer subs

Limiting access to a substance or activity doesn't address the problem, which is the behavior. If the person in question ends up replacing it with a safer substance or activity, that may be somewhat better, but they may instead end up replacing it with something even more dangerous. It's a gamble and it doesn't even address the problem. Blaming inanimate objects for the actions of humans never really helps. It would be better to address the actual humans, their actions, and the causes instead. We just don't know how to do that yet. As a society, we aren't smart enough.