What’s the deal with the ridiculous accuracy of light weapons?

They could be cheating, as there are cheats that remove recoil and spread, I have seen some post brag video's pretending to be highly skilled where you can instantly notice there is no recoil and spread on their guns. Then again I too have noticed many full auto guns do lack sufficient spread and recoil. The gun balance is pretty bad and I doubt it's ever going to get fixed.