Aging is due to DNA rebirth errors
Every 20 years every single cell in your body dies and is recycled.
Cancer is merely a cell that refuses to die and be reborn.

They say humanity will have immortality in a few years by curing “DNA rebirth errors” because “the cure already exists because there’s always a cell [that is the cure] that kills the cancer or DNA rebirth error but the only problem preventing immortality is that it gets overwhelmed and outnumbered by cells that refuse to recycle/die”