i think this is a bit of an overstatement
there is no rulebook, you can use whatever line you want and you will probably do just as good as the next guy.
like me, i use Powe Pro for everything, worms, jigs, topwater, cranks, spinners, finiesse, anything....even though everybody says your not supposed to use it for all that, i do, and i dont see why i shouldnt. i havent noticed any negative results.
PUT BRAID ON THAT BAD BOY!