Looking at it from a philosophical utilitarian standpoint, that life is worthless because it isn't developed or sentient.
Utilitarians are known for great things like genocide and suppression of human rights, go you.
The cellular structure isn't exactly independent.Is an Egg a chicken? No, it's not.
From a logical standpoint, it's also still not a human. It doesn't have any of the components of being a human being aside from some genetic code and basic stem cells. It has the potential to become a human. It isn't a human yet.
A baby isn't a human, it's a hardly a neophyte, it has the potential to
become a human.
It would put a lot less strain on the system for unwanted children. There are children born everywhere at any given time, so there won't be an impact.
If I was aborted, I really don't think it would have mattered. Everything in the world is based on chance and things just happen. The lack of existence of one child doesn't mean very much.
"If they're going to die they'd better do it, and decrease the surplus population."