I think "vibe scripted" is harsh. The writers were bumping against the restriction that they need spoiler
Chapel blood next to anybody when they enter or exit the place. That's why the alien buys it. Scaredy pants tries to go out on his own and gets fried. They wanted to avoid another entrance/exit on screen to keep us guessing how this Star Trek Inception works.
It's a version of "commander, you better take a look at this." It keeps the suspense up for the audience as Riker saunters over, maneuvering over multiple chairs, to take a look at the corpse of the mortal enemy of the federation. In a real military, Worf would say something like "heads up, Romulan casualties on the premise, everybody be on the lookout." That's to prevent the commander or anybody else from getting shot by a possible half-dead Rom in the rubble. But that's not great television. It's just script writing 101.