I once met Peter Thiel at an event and kindly asked him if he ever had a 'Robert Oppenheimer moment' with his investment in Palantir. Not surprisingly he diverted and did not provide an answer at all. His non-answer was most telling to me and made me think about his ethics.
At least a certain level of reasoning or even PR spin about the positive effects would have been better than this.
I left deeply unimpressed about our first and only encounter.