There is nothing to see here, just a bald man carrying a massive ass sharpshooter with a barcode on the back of his head.
I mean, if he is already that close, what else can you do but just think, stay calm, Mike, stay calm?
How so? Is it because you’re trailing behind them? Even the first game featured NPCs with realistic awareness.
Since I have not played this specific Hitman, I can only assume that either he is disguising himself as a security or military figure, allowing you to openly wield firearms, or this is a carefully staged scene where the NPCs are not yet aware of it.
The orange outfit he’s wearing in this picture is the same one the armed guards wear during that mission, so it’s no surprise the NPCs aren’t reacting to him.
Hitman 2 where you can walk around armed, but if a guard sees you run then you are a dead man.
I believe 47 is in India. In this context, people can walk around with swords and poleaxes without anyone raising an eyebrow. 
Ah, the game where you are divided and evaluated based on how quickly you move. The hostility between walkers and runners is so intense that they resort to shooting instead of just being typical speedists and cursing at each other.
In Hitman: Blood Money, there is a glitch that allows you to equip the detonator, making it so NPCs won’t notice the weapon in your other hand. This means you can stroll around with an assault rifle visible, and nobody will say anything.