Is there a reason why Medical schools don't like vocational majors ?

I keep hearing this but its conflicting because not all vocational majors are less scientifically rigorous. In fact, my major is probably more rigorous than a typical biochemistry or biology major. I'm taking up MLS at the University of Maryland school of Medicine. Why ? Because I find the course work more interesting than bland and boring pure chemistry/biochem/biology. Instead, I'd be looking at the more clinical sciences like Pathogenic microbiogy, parasitology+ mycology, clinical... Is there a reason why Medical schools don't like vocational majors ?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums