How much bearing does a parent being an alumni hold?

I apologize if I come across as whiny but this has been bothering me and I just wanted some input. I have a couple friends and a friend of a friend who have interviews at two particular schools that I also applied to. My dilemma is that I objectively have a better application then all of them, yet I still don't have interviews at these schools. I have a much better MCAT (up to >10 points better), research with a publication and a poster (they don't have any research), WAY more leadership,... How much bearing does a parent being an alumni hold?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums