Can finger independence be trained?
If you train your fingers to move independently then playing the guitar becomes effortless. Doing this is NOT down to talent. Even if you've got the shortest, fattest fingers in existence, you can still get good finger independence with just a bit of practice. ... Focus on training your fingers to work for you!
Why can I not move my ring finger independently?
Because the nerves for the ring and pinky finger are intertwined, it becomes harder to move each of these fingers separately. The same things happens between the ring and middle finger. ... This combination of handicaps to the ring finger by both your musculature and your nerves is why it's so hard to move it on its own.