You know how Lucci has his philosophy of 'dark justice'? Like he gets far because his superiors are informed by the demands of the gorosei. The gorosei and Imu have proven themselves to be ruthless and calculating - often resorting to calling people insects who need to be corralled. They have no qualms exterminating entire islands for wrongthink. The point being that marines are serving these goals and must present themselves as being harsh and awful because those that they serve have a philosophy of being harsh and awful.
When I look at this picture, it's like you can feel the pandering to the IRL gorosei. You can sense that there's a bunch of tenryuubito with their bubble helmets on that are just shocked about how such a thing could have happened. They need to be placated by this absolute clown parade concerning a 20-something IT guy with back problems in handcuffs. Does a third cop make anyone more safe? The only other thing that it can possibly communicate is that they're afraid of a mob harassing them. More saliently this is a pornographic display of just how safe and how protected the smol bean rich people are. They simply cannot be seen without a person in full combat gear with an automatic rifle leading the way.