You may know everything their is to know about music but still be a bad songwriter. you give people tips and you may even take a songwriting class but that wont make you a good songwriter.

I hate to say it but some people are just born with that gift. you cant pass it on or give it to someone.

People always go on about writing songs in this key or that key having great chord progression or using this clever wording. All good to know and having a good musically knowledge is worthy but it still won't make you a good songwriter.