you have to do something to make urself stand out. the "kids right out of undergrad with high gpa/gre" did that. other people may have gone into bussiness or construction and had great grades there and just are looking for something different. they went back and even though they were bussiness majors got mostly a's in the prereqs even though they werent science majors may already have had a family and were working while going back to school.
u havent done anything to make urself special or different. everyone on here is telling you ways to do that. there are many different ways to do that but having below average grades below average gre and less healthcare experiance than most of my classmates isnt going to get u in.