Some countries such as Canada are aiming to increase the suicide rate. We can argue about whether that's a good or bad thing but the aim is obviously not zero.
No one wants suicides increasing as a result of AI chatbot usage. So what is the point of your question? You are trying to drain nuance from the conversation to turn it into a black and white statement.
If “aim for zero” means we should restrict access to chatbots with zero statical evidence, no. We should not engage in moral panic.
We should figure out what dangers these pose and then decide what appropriate actions, if any, should be taken. We should not give in to knee jerk reactions because we read a news story.
It’s dishonest firstly for intending to invoke moral outrage rather than actual discussion. This is like someone chiming into a conversation about swimming pool safety by saying “How many children drowning is acceptable?” This is not a real question. It’s a rhetorical device to mute discussion because the emotional answer is zero. No one wants any children drowning. But in reality we do accept some children drowning in exchange for general availability of swimming pools and we all know it.
This is secondly dishonest because the person you are replying to was specifically talking about murder-suicides associated with LLM chatbots and you reframed it as a question about all murder-suicides. Obviously there is no number of murder-suicides that anyone wants, but that has nothing to do with whether ChatGPT actually causes murder-suicides.