But as I said, the issue with Tuvix is that he acted selfishly. He placed his own survival above that of others, and even took aggressive action to try to preserve his life. Now, from his perspective, that was understandable, but what about the rest of the crew's perspective? Would they have been able or willing to trust him with their lives after he did something like that? I still feel that Janeway made the choice she did because she was thinking of how the rest of the crew would react. After what Tuvix did, they wouldn't have accepted him anymore, and that would've damaged crew cohesion and possibly had dangerous consequences in crisis situations.