The bottom line is the joy of the music. Many can find joy with three chords and a simple strum (I wish that I was that kind of person). Some people want more and love the challenge. Whichever type of musician you are, embrace it and enjoy it.
We began working with major chord 2 shapes - As you will remember, a major chord is made up of scale notes 1 (root) 3, and 5. In the below diagram, the R and numbers at the top identify these notes that make up the chord.