Your parent/child analogy doesn’t fit. Parents don’t physically combine to create a chimera. Parents don’t have to cease to exist so that a child can exist.
The Seven analogy also doesn’t fit, unless you’re suggesting that Tuvix is analogous to Annika+Borg, in which case Janeway was consistent: nonconsensual chimerism should be reversed.
Your parent/child analogy doesn’t fit. Parents don’t physically combine to create a chimera. Parents don’t have to cease to exist so that a child can exist.
The Seven analogy also doesn’t fit, unless you’re suggesting that Tuvix is analogous to Annika+Borg, in which case Janeway was consistent: nonconsensual chimerism should be reversed.