Well I don't know about
@Goro's students, but I had literally 10K+ hours of research including a few thousand when I was CONSULTING for the NIH and had multiple publications (also worked for the Russian Space Agency and have a few thousand hours with them), I was a founding member of a 501(c)(3) organization, started several companies, did theater for 20+ years (including doing competitions), was involved in film, tv, and radio, organized a few international conferences (I was an officer in multiple international organizations as well), I didn't do campus events because I was too busy doing national and international events, and I had several thousand tutoring hours. I was not on a full scholarship because I ran away from home to go to college (no contact with them for like 3 years) and went to a school far far away from my parents to a top 20 private university. I also have a few ordinations as scary as that is, have a disability, read more than a few languages, was a first generation college student, had been homeless a few times (and was homeless when I was accepted to medical school) and as am a member of several minority groups, am LGBT and have four kids. I also had 400+ shadowing hours and 300+ medical volunteering hours. I am probably more typical than not and it took me four cycles to get accepted.
You still need shadowing and some clinical otherwise you very well could be rejected for that alone.
That being said, I do know people who got in with little or no clinical volunteering hours and it really really shows. They grabbed the person I am thinking of because she worked full time during college and is from a very very small town, worked in a smaller town and wants to go back to practice in the teeny tiny town. Almost everyone in my class has a few hundred of volunteering/shadowing.