Ask HN: Is it possible for uneducated person to join YCombinator?

I have been checking over 30 successful YC applications. One thing I observed in all of them, that they are all coming almost from either Ivy league or top corporations.

I have a high school education from Egypt, and I never made my way to Ycombinator.

Could it be the reason that YC prefer folks from top schools or top enterprises over others?