Don’t worry about the listed school can’t get you into the med school or not, what prevent you to get into a med school is your GPA and Mcat. Most(some thing like 75%) of the premed drop out during their 4 years in college, so your friend’s experiences are typical.It is not where they went to school, its what they did in the school that made them uncompetitive. Med school only take in top students in each college.
As a premed, do not chase “top” name UG such as JHU. You should choose a school where you are the top 25% of the entering class that makes you competitive at the very beginning and hopefully you will be competitive when you graduate.