When the garbage truck roars into their street, wakes them up with the mechanics of lifting the wheely-bins and putting them down, beepbeepbeep reversing, and roaring away - no complaint - "It is an essential service."
When the drug dealer who lives 3 doors away has his mates around on their Harleys, and they make a lot of noise - no complaint - "They might kill me."
A helicopter flies past, with less noise than either of the 2 above - "THAT HELICOPTER DRIVES ME MAD! Trailbikes of the skies! Get rid of them!"
It is a thing called "perceived noise" and is a problem in places where the government pays any attention to a complaining citizen. In other places, the choppers operate without interference.