I am lead to believe, based on what I've read, that let's say the roots of "suicide prevention" are evolutionary and cultural. While the biological element is probably not going to go away in foreseeable future, the cultural one - especially the mentioned stigma -, is subject to change granted there is will to change it.
Personally, I hope that the support given to those who are set on committing suicide would be similar to the support given to those who signaling the possibility of committing one. I would also hope examination of socio-economic realities of those displaying signs of being suicidal is not preceded by psychiatric evaluation with appropriate steps taken accordingly.
Since I am not sure what direction the OP was heading and since this topic is quite complex, let me finish with a definition of selfish I prefer: for own benefit, without regards for others.