Re: Janeway's Decision to Kill Tuvix
From Memory Alpha:
Tuvix actor Tom Wright was unsure if he could discern a moral in the episode's plot. "Not one that I can really pick out immediately [....] There isn't any moralizing," Wright observed. "It's just a story about a character, and you follow that character during the time he is alive. You watch the birth and the life and the death of one character in one episode, and there is no struggle between good and evil. It's purely a no-win situation."
When asked if he thought Tuvix should be spared the separation at the episode's conclusion, Wright stated, "I think it was inevitable that he would be separated. There would be no drama without that separation. So, I completely agree that he should have been separated."
Dr. Howard, Dr. Fine, Dr. Howard: For duty and humanity! --Men in Black, 1934