What's the big deal about viewing error? It's a metaphor for how we can view the things around ourselves and what is within ourselves. By understanding how we relate to what we are viewing whether it is a clock, a machine, another person or groups of people or even ourselves (things we've done in the past) then we can take account of our relationship to what we are viewing. We can look at different views of what we are looking at and see the truth of it independent of our point of view.
It's a way of seeing the truth or its a way of seeing and understanding different views of the truth.
Another word for zero parallax is understanding. And that's basically what this website is about. Understanding. Tools for understanding and stories about myself so that if you choose you can understand more about me.
And that's something else about zeroparallax. It's about choice or making the effort to choose (and being aware of the choices that we make with regard to) how we relate to what we are observing.