“We are going to die, and that makes us the lucky ones. Most people are never going to die because they are never going to be born. The potential people who could have been here in my place but who will in fact never see the light of day outnumber the sand grains of Arabia. Certainly those unborn ghosts include greater poets than Keats, scientists greater than Newton. We know this because the set of possible people allowed by our DNA so massively exceeds the set of actual people. In the teeth of these stupefying odds it is you and I, in our ordinariness, that are here. We privileged few, who won the lottery of birth against all odds, how dare we whine at our inevitable return to that prior state from which the vast majority have never stirred?”

-Richard Dawkins

Why? You would not be there to notice

Think if it like this

Do you remember the exact time you fell asleep? You remember having your eyes closed, thinking about tomorrow, then nothing, like your brain is skipping it, every single night, then you wake up, add dream here an there

But, you don't know where exactly you fell asleep, that's what I think the nothing is, you wouldn't even know that