Problem is that your average non-reg team is going to be sucking up more meds than res. Second, your average non-reg team doesn't understand waypoints, orders, wolfpacking, or pressuring.
Mind you, reg teams aren't perfect either, but at least with regs you can be pretty sure of some RFK rolling in.
If you happen to be the only decent player on a team of nubs, then don't expect to get meds. Effectively you're a rambo because you're the only man at a waypoint, or living long enough to need meds. Even if the comm meds you, you're going to die shortly afterward because you've no backup. So it makes more sense to do researching, or save res for getting you a bigger gun, as opposed to dropping meds for no real effect.
Thats just the way it goes, sadly.