But you are right.... she is clearly underqualified:

Since about 2009, Warren has been recognized by several institutions as a major political figure. In 2009, the Boston Globe named her the Bostonian of the Year, and the Women's Bar Association of Massachusetts honored her with the Lelia J. Robinson Award. She was named one of Time Magazine's 100 Most Influential People in the World in 2009 and 2010. The National Law Journal has repeatedly named Warren as one of the Fifty Most Influential Women Attorneys in America, and in 2010 they honored her as one of the 40 most influential attorneys of the decade.

Warren has been recognized for her dynamic teaching style. In 2009, Warren became the first professor in Harvard's history to win the law school's teaching award twice. The Sacks-Freund Teaching Award was voted on by the graduating class in honor of "her teaching ability, openness to student concerns, and contributions to student life at Harvard." Warren also has won awards from her students at the University of Pennsylvania, the University of Michigan, and the University of Houston Law Center. She delivered the commencement address at the Rutgers School of Law