>>213502715
Sometimes they just trust the wrong people. With Lady in the Water after Shyamalan had been a money printing machine for about a decade disney gave him full creative control. By the time they got to see the final cut of the movie contractually there was nothing they could do aside from not giving him that kind of control again.

Other times (most of the times being fair) people just underestimate how literally retarded some producers in (((((hollywood)))) are. Will simply be literally brain dead and push their shit ideas into the movie.