This is absolutely ridiculous. Someone shoulda told Jamerson I guess. Maybe go tell Family Man, or heck, any good fingerstyle bassist. If you CAN pluck with the same finger on a bass part (i.e if the tempo allows it) you get a very consistent tone. It's very often a very good technique to use, especially in the studio. He's simply flat-out wrong.My bass instructor (an accomplished guitarist) insists that I must alternate fingers and never use the index finger consecutively.