In reality, it is more likely that there is something wrong with your co-ordination. It is very difficult to persuade your fingers to do what your mind instructs them to do.
That's what makes accurate snipers so rare. Try stopping your heart beating, just before you move your mouse.
My Teresa who was, in her time, a successful WRAC Sharpshooter at Bisley, was not able to do that but she could stop breathing, without increasing her heart rate, for the time it was required to aim and fire a shot