Mr. Cartwright chose to take his mom off the board in the movie 'The Family That Preys'. Was he justified? Was he right?

https://youtu.be/zXQjY0v5wes

"When you have established that one alternative is good and the other evil, there is no justification for the choice of a mixture. There is no justification ever for choosing any part of what you know to be evil."
- Ayn Rand