When i played BF Modern Combat and BFBC nobody played medic. So not a shock
Modern Combat had health boxes (or whatever they're called) at most flag points, though. A fair amount of people played medics too, if only because of less reloading and the ability to heal yourself. This was the 360 version, though, I'm not sure how that differs compared to the last-gen versions.
But yeah, Bad Company had almost no one playing medic though. And with no health boxes, if you were at 15% health you could easily stay at that point of black-and-whiteness for minutes. Dice really screwed the pooch with BC. Hopefully they fix everything in BC2, but I doubt it.
It'd be a shame if BC was responsible for, say, the auto-health and no medic class decisions, but the game seems to be slimmed down in order to be noob-friendly or something.