I don't accept that for Janeway. Destroying the array surely (should have) had a much more dangerous effect on crew morale and cohesion, but she did it. So her criterion wouldn't involve that kind of thinking.
That's not a valid analogy, because the circumstances were far from equivalent. For one thing, in "Caretaker" she made that decision for the good of the Ocampa; Starfleet captains are always ready to sacrifice themselves and their crews for the good of others. But in "Tuvix" it was only her own crew's well-being that was at stake, so the parameters of the decision were totally different. For another thing, naturally she wouldn't think exactly the same way at the very beginning of Voyager
's time in the Delta Quadrant, when the idea of survival there was merely an abstraction and when she barely knew most of her crew, as she'd think months later, after having had time to live with the realities of their situation and gotten to know her crew so much better.
I don't see that, failure to act isn't murder. I don't disagree about it being an incredibly hard choice, but at the end of the day if you have an innocent person who says they don't want to die...
As I said, it's not about the law. It's pointless to talk about it as though there's anything remotely resembling a "right" answer. Either choice was wrong; either choice would kill someone who deserved to live. That's what made it such a compelling and wrenching story. Janeway's decision wasn't about law or morality, because the factors cancelled out either way. It was about being the commander of a starship crew in desperate straits and having to make the choice that best served their chances of long-term survival -- even though it was a ruthless choice. That's the sort of decision that a captain in that kind of situation would have to make from time to time. Voyager
too often glossed over the harsh compromises their situation would demand, but this was one time the show confronted the issue outright. We weren't supposed
to like Janeway's decision. We were supposed to understand that there was
no good decision in that situation.