Why doesn’t this clown lead by example and kill himself?
Maybe he's afraid he won't make it to heaven if he does.
He is leading by example. He hasn’t had children and there is no indication that he will not die without offspring.
The thing is, his atheism is pretty much beside the point. He follows in the tradition of a number of Christian offshoot sects which have reached the conclusion that it is better for humanity to abjure reproduction. He does it to refrain from spawning pain and they did it to abstain from spawning sin. He refrains from suicide because to commit suicide is to bring more pain into the world. They refrain from suicide because to commit suicide is to bring more sin into the world.