The world of a musician is a vicious cycle. It is a very expensive hobby yet the pay is surprisingly low. I suppose that is why there is such a controversy over free music from the internet. I understand that I will likely never make money from the music I make, so I offer my music to the world for the listening. There are many types of music.
Natural music is created with true instruments.
It is the most common type of music. To most musicians, MIDI is not a real form of music. I suppose this could be due to the fact that people don't want to believe that computers can do their jobs for them. While this is true, I have come to understand that MIDI certainly has a place in a musician's repertoire. Soundfonts are samples from real instuments that can take the place of your general Midi sounds.