If someone has the ambitions to become a good editor studying music is necessary. An editor today has to known music. [...] You have to know how to edit music, compose and create sound effects. An editor has to know how to work with video and music simultaneously. Only editing is not enough. You have to evolve and learn about music and audio. Editors than don't take this in ten years from now will not get any jobs
The editors motto number one is to kill your darlings. If you can't do that, editing is not the profession for you.