No I don’t think they’re morally equivalent. The zygote hasn’t achieved anything even close to consciousness, and doesn’t yet even possess the cells necessary for consciousness. If I could come up with a metaphor, it’s that the zygote is but an empty vessel.
What is human life without consciousness? "I think therefore I am." Why can consciousness (mental state) have such an extreme impact on one’s rights in our society? Someone can lose their liberty, agency, or even life as a result of different “brain” “states”. Consciousness matters.
My metaphor is that the zygote contains the blueprint for a human being. It has the information needed to build a human but is not itself human. A blueprint of a house likewise has all the information needed to build the house but is not itself anything you could live in.
No the blueprint is DNA. And the DNA is housed inside of life. Without life to support, house, and replicate DNA, DNA (the blueprint) is inert.
What you’re saying is like because a caterpillar isn’t yet a butterfly it isn’t life, and has less of a right to live than the butterfly. Caterpillars want to live to, just like fetuses want to live. They don’t go offing themselves because they feel like their future is bleak. They fight and fight to survive...like all life.
Also a women would never know she’s pregnant during the zygote stage, stop trying to minimize. The zygote stage is 4 freaking days. A women might barley know she’s pregnant at the tail end of the embryonic stage.