Two things. First, she has repeatedly and specifically claimed that a "wise Latina" would make a better decision than would a white man, so I don't know how you're claiming otherwise. The law is the law, and as Fern points out Lady Justice is supposed to be blind. Saying we need diversity of experience is specifically rejecting that concept. The only way that diversity of experience is relevant is if we're to have different rules for different groups. If one breaks the law, I do not give two flying ferret fucks if your cultural heritage says that behavior is appropriate. We cannot be one society, one melting pot, if we judge the legality of people's behavior based on their cultural heritage and experience. That's just a return to the days of one action being legal for white but illegal for blacks, or sodomy being legal for straights but illegal for gays.
Second, her comments might have had some small legitimacy for primary courts where the judge considers punishment based partly on intent and circumstances, but not for any appellate court, much less for SCOTUS. An appellate court is and must be concerned only with the legal questions it hears. One is correct under the law or incorrect under the law depending solely on the law, not on one's motivations, so trying to make sure we have enough judges who understand that motivation is a step backward. If we undermine this we no longer have the rule of law; we have the rule of man, where men and women set up different rules for different groups.