Flight directors, in my opinion, can make you stupid if you forget about raw data. My FO one day was getting very low on an ILS so said you are too low. She said no I am not, my FD says I am high. It was an old 737 and the FD was stuck indicating nose down. Hopefully she is retired now. She did stuff like that a lot. At least we didn't land in the vinyard short of the runway. She left in a huff after landing so wrote up her FD thinking ATC probably got a low altitude alert I would have to explain later.