At some point they have to say "if we can't make this safe we can't do it at all". LLMs are great for some things, but if they will do this type of thing even once then they are not worth the gains and should be shutdown.
Suppose they made things worse once and made things better twice?
"Even once" is not a way to think about anything, ever.
Bridges tend to be highly associated with suicides. Should we ban bridges too?
No they don't, if we're going to start saying that we can't use any technology. If someone is mentally ill to the point where they are on the verge of suicide nothing is safe.
If they're going to curtail LLMs there'd need to be some actual evidence and even then it would be hard to justify winding them back given the incredible upsides LLMs offer. It'd probably end up like cars where there is a certain number of deaths that just need to be tolerated.