Life is far too valuable to be defined in a single moment. And for many people, this single moment is not even a conscious one, they could be sleeping, or in a hospital bed, or it would happen too fast for them to notice. So it is also something they never experience.
Life is every moment we spent with our loved ones, and the experiences we leave behind. Every interaction matters, a single experience may matter more for some people than for others, and these experiences will stay in the memories of these others when we are gone. So we should strive to live the best of these experiences.
I also believe in your 'no wiggle room' attitude. So this comment is not really for you. It is for anyone else who reads your comment in the future, so they can also see there's strong disagreement with your comment and all its ideas.