The problem of suicide isn't so much whether killing oneself is "wrong" or not, or the possible impact of someone's death on their social circle, but that it's extremely unlikely that any boundedly rational agent acting under imperfect information can truly commit to an irreversible choice. The "permanent solution to a transient problem" quip is very much true: way too many who wake after a suicide attempt take it as an opportunity to regret what they've done, and try to turn their lifes around.