Hi Paul, I'm not Erin, but I'll take a stab at it. (You're probably thinking, "I said Erin.")
I think it's the same reason why we are admonished to live in the moment. In the moment we have access to all the Knowledge, Substance, Love, Joy, and Good things. It is All available right now.
Our memory serves more to cloud our perception of what we can and cannot be, do or have. Just memories from childhood limit what we think we can do. Our so-called knowledge about science keeps us from defying it or even thinking that it is defiable (until someone does it). Imagine if we had lifetimes of such information.
Better to be completely present and choose from the Infinite Realm of Possibilities that is readily available.