When a pianist plays a hymn at the organ, several complexities arise due to matters such as the absence of a sustaining pedal. As he or she attempts to resolve these matters, a non-legato touch may result; that is, there is little (if any) true legato in any of the parts.
A well-trained organist may use a less legato touch in hymn playing for expressive purposes. However, there is a great difference between a non-legato applied in this way and a non-legato that results from a lack of independence or control (as described above). Strive in the early stages of organ training to distinguish between these two applications of non-legato.