I will say there is a difference between very impulsive attempts at ending ones own life during a dark episode and more pre-planned attempts.
In the impulsive case, even minor obstructions can cause the immediate impulse to fade, avoiding a very final decision. Hence why many impulsive survivors don't attempt twice. For these cases, keeping knowledge contained is a good thing in my book. This kind is also why guns are terrifying. Guns are one millisecond of impulse for an eternity of consequence.
On the other hand, if someone is an incurable pain patient for 20 years and eventually decides to not be a pain patient anymore... there is very little you can do about it.