2
Size of supraspinatus tendon
(lemmy.pt)
Since tendons connect bone to muscle, they have some blood flow and can possibly heal. But ligaments connect bone to bone, so there is no blood flow and they cannot heal themselves. Thus tendon tears have a greater likelihood of healing without intervention. But the shoulder is a daily driver, and repairs can make life way easier, especially with a shoulder to chest tendon like the supraspinatus!