I found Tim's speech regarding Apple's role as an enabler of social justice to be utterly ironic, if not hypocritical.
Yes, a camera in every phone in conjunction with social media has enabled victims of oppression to bring their plights to light. But where is the justice for the Foxxcon employees who committed suicide due to unrelenting pressure by their bosses? Where was Apple to demand better working conditions BEFORE the press ran multiple articles on the issue.
Personal values and ethics is another good one. What does it say about the values and ethics of a company that pioneered tax evasion strategies - leaving more of the general tax paying population holding the bag? Or the use of strong arm legal tactics to compete via the courtroom rather than through innovation?
Like many successful CEOs, Tim Cook's ruthlessness, like Steve Jobs before him, is well-known. By definition, ruthless individuals are devoid of compassion; values which are at odds with decisions that focus on maximizing profit. We'll never really know, for an example, if "coming out" was either a PR stunt or a genuine gesture. The point is, it's hard to reconcile what a CEO says before a podium versus what actually occurs in Apple's boardroom.
Speeches by CEOs at educational institutions are often made for two reasons: PR value for the company and increasing the perceived value of said institution hosting the CEO. It matters little who the students nominate at the end.