Flight Directors - a sometimes fatal attraction

[de facto]

I really think flying manually with the FD on is a total useless exercise,(except maybe for ILS)any monkey could do that.
There is time for the FD and AP to be engaged( RNaV dep..) and time to fly all off...
I have had fos trying to fly through the FD..only thing it does is offtrack during rnav departure...following this see through flying...a FD off AP off is proposed during descent by asking for vectors..most accept,some are persuaded,some dont want.