Q: have you ever tried writing a song in the locrian mode
A: what happens when you try to base a song in locrian: it almost immediately tends to shift into neighboring relative normal modes. for example, if you start writing something in C locrian, it's going to have a tendency to start sounding like Bb minor, or maybe even Db major, or perhaps Ab mixolydian, etc... I think you'll find it will be an uphill battle to continue to 'prove' that C is actually the root of it