(artists further subdivided as:)
a. artists with craftsmen/craftswomen ability
b. artists without craftsmen/craftswomen ability
The hacks aspire to be craftsmen/craftswomen, but fail to understand and replicate the emotional connection between song and a typical listener.
The craftsmen/craftswomen understand how to create an emotional connection between song and listener, but lack the special madness that transforms music from passable to great.
The artists possess that special madness lacking in the craftsmen/craftswomen.
The artists with craftsmen/women ability are the best songwriters, as they exhibit the lunacy that makes a song unique and memorable without losing their ability to communicate and connect with the average listener. They are both visionaries and communicators.
The artists who lack the communication ability are the ones lost in outer space (although they may find an admiring niche audience whose psychologies coincidentally overlap with those artists' psychologies).