I don't think the average med school really addresses pathology-the-clinical-job at all. Pathophysiology, aka what you need to know for USMLE, is thrown in for some background and may have a somewhat familiar tone to those (most med students, probably) who did a lot of biology in undergrad. Med school pathology is often basic-science oriented, while the medical practice of pathology is a different sort of beast. Some may be exposed mainly to CP pathologists, who tend to spend more time in the "lab", or blood bankers who may do a quiet mix of lab and seeing a few patients/wandering the wards without the same madness as IM. It thus gets an academic, booky, familiar feel to it, and students are told it's a fairly easy lifestyle and everyone just does research. Somewhere they realize that a microscope is involved, but that's just another part of the academic science feel. I suspect some assume the job is no more difficult than the classes -- learn the book and the rest is easy. I suppose the teaching impressions might be somewhat relevant to some CP, but it often doesn't apply well to AP.
The reality is that CP-only pathologists are fairly uncommon, and for everyone else there is a lot of visual interpretation -- not nearly as much objective scientific interpretation as I think some people expect -- and perhaps a lot more clinical interaction and initiative required to be successful. There is usually very little familiarity with what happens in PGY1, in contrast to what I think some people expect. You actually -don't- need to know obscene amounts of pathophysiology to be a successful pathologist -- to be honest, a lot of med-school pathophys is probably wasted time except for USMLE requirements. It can help, yes, sometimes even a lot, but it's generally not how you spend your days.
Basically, it's a complete dichotomy. On the one hand it's "taught" like a basic science out of a book, but on the other it's "practiced" much more hands-on/eyes-on with a lot of subjective interpretation that students are often not prepared for in med school -- not like they are taught to get a history, do a physical exam, interpret signs, symptoms, imaging, etc., even if they may incorporate a pathology -report- into their typical clinical studies it's a far cry from generating that pathology report in the first place.