Two Crew Members versus One Crew Member = Janeway's decision is correct.
Excellent Vulcan + Annoying Talaxian versus Smarmy Creepy Conglomerate = Janeway's decision is correct.
Breaking Kes's Heart and Breaking T'Pel's Heart versus Breaking no one's Heart = Janeway's decision is correct.
Having to look at Tuvok and Neelix for 5 More Seasons versus Having to look at Tuvix for 5 More Seasons = Janeway's decision is correct.
Exactly. It's a no-brainer. And calling yourself a separate sentient creature that deserves its own life doesn't make it true.
"I am Tuvix. If you separate me it will be murder."
"No it won't. You're a combined creature. What is so hard to understand about that."