This paper highlights that it had positive effects for those who had a previous hospitalisation with a suicide attempt, a study[1] also shows that 26 % classed as MA's (more than one attempt) regret their recovery opposed to 7% with a single attempt, so I get your point but these decisions are often not thought out and made rashly.

[1] Miranda, Regina, et al. "Suicide attempt characteristics, diagnoses, and future attempts: comparing multiple attempters to single attempters and ideators." Journal of the American Academy of Child & Adolescent Psychiatry 47.1 (2008): 32-40.