A map is used to find direction and your current position. I find you can get all this from listening to RAP,
Now RAP is to me rhythm and poetry which can be changed to music and poetry(MAP) but we are taught that rap has no meaning in the bigger picture when in fact it paints the current picture

Now we only have our position how can this be a map? In life you find direction for oneself so how could this differ? Rap lets you know where you are so you can know where to go because life is change,
Not only to acquire fame but those who make the biggest change are the ones who are most famous, that's your direction not fame but to make change.

So we have direction and position proving RAP can be thought as a lyrical MAP