Failed attempts to commit suicide, which involved a near death experience (NDE), almost always resulted into a radical change of attitude. There are some sources on this, I would have to google.
I was amazed to hear about this from a relative, who tried to kill himself and experienced the full out-of-body-tunnel-and-light thing. He had the feeling that trying to kill himself was the worst mistake ever and he really changed after surviving it.
But let us not be romantic about the NDEs. Many survivors do NOT experience it as joyful. There are also reports of horror trip- like experiences.

If one could induce these states, it would perhaps be a good idea to send a determined candidate out to that brink - only to decide lateron, whether they would really like to do it.

One of the biggest problems in "assisted dying" is that it attracts very strange people. Journalist friends of mine researched a bit on an organisation, which helped candidates on their last steps.
The findings were ...creepy, to say the least.
They sent out undercover candidates to get footage of the way, one particular "death consultant" did his interviews.

It was exactly the kind of person that should be kept (if not locked) away from anyone with the slightest idea of going suicidal.