You know what? I've actually done a 180 on this since this morning. A LOT of the evidence seems dodgy. That is NOT a medic pin the "doctor" is wearing. I'm not entirely convinced that's an autoinjector and not sure why he'd have it out while walking in a crowded hallway.
But, yeah, he didn't run onstage to protect her. He ran up there to comfort her. And, initially, I was like who is gonna believe this big, bodyguard looking guy is a doctor. Of course they would get someone with the bare minimum of medical skills who could pass for a bodyguard if they were trying to keep this a secret. He's big, but compared to the other bodyguards, he's in horrible shape.