One point that hasn't been bought up is
What guarantee was there that Tuvok anf Neelix would be safely restored? What if it had failed and all three lives were lost?
If nothing was done at least Tuvix was 100% alive.
Another point is
Why did the Doctor refused to do it if it wasn't unethical or a wrong thing to do? The Doctor had in the past had always been ethical (which I don't think you can say about all of Janeway's actions).
What guarantee was there that Tuvok anf Neelix would be safely restored? What if it had failed and all three lives were lost?
If nothing was done at least Tuvix was 100% alive.
Another point is
Why did the Doctor refused to do it if it wasn't unethical or a wrong thing to do? The Doctor had in the past had always been ethical (which I don't think you can say about all of Janeway's actions).