If Thiel's actions cause smart students to drop out of school and fail at starting their own companies, that will be great because then the companies that hire the failed dropouts will have to develop non-school-related methods for discriminating between the good ones and the bad ones. If those non-school-related methods become good enough, they'll start using them on graduates as well, and then there will be actual pressure on schools to educate students effectively (along with the option of teaching yourself instead of going to school if that fits your style better).