The rationality of the disbelief in a creator is the core tenant of atheism, as atheist cite, in their view, the lack of empirical evidence (whatever that means) is the rationallity that drives the idea that there is no such thing as a creator of life or the cosmos as a whole.atheism only touts a disbelief in deities. nothing more, nothing less. you are adding stuff that is not atheist.
Now back to the topic.
If you want to discuss that atheist view life and death symbolically and not scientifically, then it is easy to see the flaw in that type of belief as symbolism is logical comparison without any empirical truth to the proposed parallel.