What seems to be common in this argument is that people fail to see that there are many other things a person can try, such as change in lifestyle, meds, therapy or even intense rehab before they need to go to the extent of having to kill themselves to relieve the pain. In this case a person would rarely ever be left with it as an only option.
From what I hear, suicidal thoughts come and go very quickly. You feel suicidal one day then the next you feel a bit better and don't consider it any more. If someone commits Self Delete they won't be around to know if they regret the decision and would miss out on all the opportunities life provides. Like I said above it very rarely has to be considered an option.
Taking one's life is not a form of therapy, it would be better described as an anti-therapy. It doesn't fix a problem, it stops you from feeling it, along with life as a whole.