Its not about what job you did, its about how you applied what you learned in that job to medicine... My dad was a doctor, that doesn't mean that I had a paved path...Far from it...I worked in a factory for 2 years and construction for about 5. Niether one of those seems like it would be too impressive to an interviewer either...But you take your experiences and apply them to medicine...that's what will get the ADCOM's attention, not being a pampered son/daughter of a doc.
By the way, you don't have to have a parent involved in medical missions to go on them. And like I said, my dad's participation in those trips and my being around my dad's office helped me to "fall in love with medicine"...if you've chosen medicine, then I'd hope you're equally as fond of it...Probably because of different reasons. Basically, these things may have been an advantage in that they led me to medicine, but not as far as getting in to any schools.