I agree that jumping shouldnt be anyone's first choice due to the public gory aspect to it but I can see the reason why as I were in that shoe before. Here's what I thought:
1. Train jumping method, or any other jumping method, usually get its way to the media.
This makes it as a method that publicly known, meaning a lot of people in despair know that this method is lethal enough to kill them by seeing it on the news every now and then. It is relatively "simple" with little to no technical knowledge or logistics, accessible to practically anyone. Not everyone wise enough to search the web deep enough to research their method to find out about more peaceful approach. Or they simply didn't think it is possible and available. Our society is still far from accepting civil discussion on abortion, let alone suicide methods.
2. Some people purposely want to make their end a "grand show".
I know people to want to leave this way. Grande. Make it to big news. Make everyone discussing it. Finally, they could make a statement, even if it costs their death. Were they trying to say "fck u" to government? To society? To their own family? Whatever that statement might be.
I am not justifying this method, but I think the courage needed to pulled a ctb in public like this is tremendous. I can only imagine, whatever that drives them there to actually step out from the platform, must be extremely horrible. Ctb is not an easy task, whatever the method is, but this method needs exceptional courage in my opinion so I still have to acknowledge that. (Despite all the trauma they caused afterwards. Again, if you're here anyway, please consider more peaceful method).