I think the blonde hair and blue eyes have more to do with the witch-hunt by the WSJ than they have had to do with the investors' inclination to invest. There are a million reasons besides failed tech for Theranos to conduct its business the way it is doing right now.
This WSJ article is full of hot air, and actually has nothing of substance to say. The hilarious phrases 'according to people familiar with the matter' and 'a person familiar with the matter' appear nine times in the article, when discussing outcomes that potentially 'could' happen if other things that haven't happened so far actually happened.
But thanks for putting into words what everybody is really thinking, but doesn't want to say out loud. It boggles my mind just how much people really want a pretty girl to fail in the tech business.