“Any writer who has difficulty in writing is probably not onto his true subject, but wasting time with false, petty goals; as soon as you connect with your true subject you will write.” – Joyce Carole Oats

 “If you’re actually allowing your creative part to control your writing rather than a more commercial instinct or motive, then you’ll find that all sorts of interesting things will bubble up to the surface.” – Emma Thompson

I agree. Songwriters can write a song about anything. Give a songwriter a prompt and you will have a song. But, to end up with a great song, you must care about your subject. Have something you want to say. A reason for the song. A targeted emotion you want to pass on. A feeling that means something to you.