Yeah, I noticed that too. If you define suicide in such a way that it is only done by mentally ill people, congrats. You've essentially made a sort of Anselmian argument, trying to turn this into an analytic judgement. God exists because I define him this way; suicide is only done by the mentally ill because of the way I define the terms.
"The reason things will never get better is because people keep electing these rich cocksuckers who don't give a shit about you."
-George Carlin
-George Carlin