Because sometimes suicide can also be about making a statement.
“[X] had me suffering so bad I had no choice but to kill myself. I want people to understand how bad and unbearable it was to take me to this point. I want it to be in the news. I don’t want it to be swept under the rug.”
Also consider the last thing something someone who’se in a position so bad they want to die, and often who feels completely abandoned by society and “the system”, is to start a grueling bureaucratic procedure. To have to face their friends and family and explain they want to die… etc.
Sometimes it’s the easier way to end the suffering quicker.