Optimization for self-production may explain mysterious features of the ribosome. A new study explains the previously mysterious characteristics of ribosomes, the protein production factories of the cell. Researchers mathematically demonstrated that ribosomes are precisely structured to build themselves as quickly as possible to support efficient cell growth. Source 3m.
Well I would hope so for the bodies ability to heal itself. Everyone knows that cell growth in the healing of the body after it has been damaged and cells killed it the main way for healing. If they did not have this great ability or it was slower think of how long it would take to heal.