The reason is because they want to remove randomness from the game, so player skill is the deciding factor in winning a fight. It's actually the exact opposite design from Morrowind, where it was inspired by the randomness of tabletop RPGs.
So if the shots aren't randomly distributed in a cone, and aren't perfectly accurate, and aren't a fixed spray pattern...what exactly is left?
Games have tried that before, it's extremely jarring to have your cursor/camera shake around without your input, and depending on how it's done it makes visibility suck.
So if the shots aren't randomly distributed in a cone, and aren't perfectly accurate, and aren't a fixed spray pattern...what exactly is left?