Why did a company focused on genetic counseling choose the name "Metis"?

Because it's a perfect fit!  

Metis was the Titan goddess of good and wise counsel.  She was the first love and wife of Zeus and was his counselor during the Titan War.   However, Zeus, in fear of a prophecy that she would bear a son more powerful than himself, swallowed the pregnant Metis whole. Their daughter, Athena, was later born fully grown from the god's head.  

Metis returns to provide good and wise counsel once again.