It's just another example of the sloppy, rushed, and ultimately flawed script that drove TUC. The entire Khotomer scene is absolute nonsense. There's no orbital security? No sensors to let the ground know that a f#cking space battle is taking place in orbit?? No on-the-ground security? NONE??? I mean, at the very least, you'd expect some internal sensors or some transport inhibitors or something. A head of state of a major power was just ASSASSINATED, and this is the most important historic event of the last 100 years, and their only security measure is to "keep the location secret...??" And even this was bunk because both Chang and Sulu knew the location.
I always have to suppress a laugh when the Klingon casually walks up the long corridor to a very convenient sniper perch with a large suitcase filled with sniper rifle parts without so much as drawing a raised eyebrow from anyone. Then, he's able to cut a hole in the glass, etc without being seen, caught, or interrupted. Then, equally as funny, Kirk and company beam down and everyone starts milling about and acting confused (whilst armed members of an orbiting starship's crew beam in and start running around pointing weapons at people). Klingons yell "Protect the Chancellor" and create a loose circle of bodies around her (really?...That's what you're going to do?). Meanwhile a wild-eyed accused assassin and intergalactic prison escapee is yelling "Mr. President!!! Mr. President!!!!" and charging the head of the entire UFP while the dad from That 70's Show just stands at the podium, looking slightly confused and panicked, like how I look when I realize I just ate sushi that is past the expiration date. Nobody is in position to protect the fully exposed head-of-state from anything, let alone the ranting and raving 60-year-old madman who is about to jump higher and further than Lebron in an attempt to clothes-line tackle the president out of harms way.
I've always put this reason, as well as "how does a starship that has sensors and scanning devices 300 years more advanced than anything we have today fail at simple forensics which could have ended the movie at the 20 minute mark" as reasons I can't get behind this movie with any kind of seriousness.
I hate to bash on it, but it's so filled with foolish "look the other way" contrivances and nonsense that it has aged so horribly.