"As the result of my business venture I was able to graduate with a PhD without taking out a single student loan."
1) Mike already told us that he was receiving financial support from his parents up to this point and that his "business venture" was funded by a small inheritance he received.
2) Mike also noticeably DOES NOT say that he didn't receive any other sort of financial assistance aside from student loans (Pell grants, scholarships, etc). Being a teacher's assitant as he mentions he was is typically part of a work study financial aid package.
So exactly how does Mike's story contradict Obama's statement that successful people have received help along the way?