We can not know what was in the souls of the people that kill themselves but we do know about the people that survive/fail their attempt and the vast majority of them regret doing it about a second after it is done. We also know that most people that are provided help with the thing that makes them want to kill themselves are grateful to the people that stopped them.
That is the sympathetic angle but you don’t seem very sympathetic so the other angle is, Fuck people that kill themselves by traumatizing other people. Jumping into traffic will at best cause trauma to witnesses and at worst cause injuries or death when cars swerve to avoid your body. If you want to kill yourself like that you deserve to keep living.