According to studies, many who fail their attempt say they regretted it the moment they swallowed the pills, took the step off the ledge etc. and were grateful for being saved (or "saved", in our lingui). Of course these studies could be biased to some degree because we live in a "pro-life" society, but I think it's reasonable to assume that many broad-daylight suicides are impulsive and should be intercepted whenever possible.
For me this is the strongest argument.
However suicide is so complex that in my opinion all scratches the surface. As others point out survivorship bias. And maybe correlation is no causuality. Probably the people who were not determined to go through with it chose less lethal methods. And there are so many people who attempt with methods that barely work like generic antidepressants or stuff like that.
For me there comes something different to mind for my own specific case. I honestly feel for the sake of myself I should kill myself when my time has come. My dignity is far far behind me. I was humiliated and tortured like a million times. Still I am alive. For two reasons. SI can be extremely strong and I had no secure and lethal method to the time of my severest torment.
Someone in this forum recently described God saved them from committing suicide. And that he is so glad he finally realized that. I am glad for him. I would hope anyone could find relief in such a notion which keeps them alive.
However for me my personal life. I don't want that. I know what is ahead of me and no matter how I frame it this won't change the fact that my daily life quality is nightmarish with a many decades of torture ahead of me if I don't ctb.
Suicide is such an existential moment. Things like spiritual awakenings can happen. However I think they mostly stem from extreme anxiety that comes along with dying. Looking death inside its eyes.
When I was acute suicidal some years ago I was at the balcony of a 7 th floor building and looked down for quite a while. I swore to myself to try anything that is possible to avoid my suicide when i was there.
I think if I survived a suicide attempt my fear about death could increase a lot. SI could become even stronger while the pain itself does not transform. Maybe my mindset could change. But the pain was still there. And I don't want to endure this insane pain that haunts me for more than a decade for even more decades.
I could imagine such a spiritual awakening could also happen to me. And I don't want that. If I decide to attempt I will be determined enough to end it once and for all.