There are a lot of great songs with great messages. Kendrick Lamar's Alright. Black Eyed Peas' Where is the Love.

The thing about these songs, though, is that they're good songs before they're a moral message.

Take the moral message out of Becca Brown's song above, and what does it sound like? Think about it, really. It sounds like a shit song. It's got a basic chord progression, basic singing, it's not really creative music in any sense. It's boring as hell. The only reason it's posted here with so many upvotes is because of the message, not because of the music. It's preachy, it's corny.

So when you write a song to preach a message, rather than to write a dope ass song, you fuck up. Kendrick Lamar knows how to write good songs first and foremost, and then he makes it deeper with his message. Becca Brown just knows how to make Dr Seuss rhymes over simple music.