I'm glad I'm not the first one to say this. The on-site medical can triage, determine what is needed, and if necessary get EMS dispatched to the correct door with someone waiting to direct them in.
The article did make it clear that the on-site medical staff were sometimes insufficient.
You don't know if a person on the floor hit their head on something, passed out from exhaustion or low blood sugar, or (worst case) having a cardiac emergency. Rest and a candy bar doesn't require the waste of EMS resources. A bumped head can be a low priority dispatch.
When I worked in a warehouse, we had one front door. Easy, right? Not really. The warehouse was huge, with loading docks with truck bays and doors across the entire rear of the building. More than likely, the fastest route out was through the back. Telling EMS "go to the back of the building" could have wasted a lot of time trying to find *where* to be.
I found out the hard way that the "nurse" who worked the medical clinic on the night shift at my warehouse was untrained. I got a nasty gash on my hand, and I was bleeding a lot. I got a paper towel, applied pressure, got to my manager and then the clinic. The "nurse" bandaged it. The bandaging looked more like I was holding a gauze covered softball, which put no pressure on the wound. She offered to call EMS because I needed stitches. I couldn't afford the time off.
I took the bandage back off, and taught her how to do it properly. I didn't have a lot of training before that, but it was enough to properly bandage a wound (among other things). She appreciated the instruction. So I learned the "nurse" was just "someone to sit in the medical room for compliance purposes". I had to work late that day to make up for the time I spent in the clinic. They counted it as an unscheduled break. Bastards.