Sex, among adults, is knowing. It has consequences. Notice that I am opposing innocence to experience, like Blake, not to sin, like a preacher. That's a crucial difference. Yes sex means death because you only transmit half your genes.
Life means death.
Sex is only an adjunct. Transmitting half one's genes doesn't seem to me like such a bad deal. As any Christian might. Some of the things we say may outlive us. And yours sound like the squalling of an infant unwilling to accept suffering and something less that omnipotence.