I'm not being mean but for starters, they will not be able to hear and/or see the movie anyway.
Secondly, A LOT goes into making a movie and they are on a budget and time schedule. For producers, directors and other cast members to do their job, they have to be able to communicate all aspects on the movie setup with ease. Trying to direct a deaf/dumb/blind person will naturally take longer and be more difficult. It's a far fetched attempt to label people as unfair!