I think it's because us bass players are more likely to 'go with the flow.'
Come to think of it, how did E-e become the 'standard' for guitars and no
It's very simple, E, A, D, G, B, E puts most of the notes of a major chord on the same fret. Raising the top two to make it all 4ths would nearly require two extra fingers to play a chords.Come to think of it, how did E-e become the 'standard' for guitars and not fourths?