Yes, if a zygote or embryo were "human life," then I would likely be more against abortion than I am now. But they are not.
Who says?
This is a scientific and medical question, sir, not a societal one. Why? Because law and society CHANGE. What both say is 'this is truth' one day will be redefined as 'oops, we were wrong; THIS is true now."
This is beautifully illustrated by the way people assign the term 'human being' to humans. There have been times in human history where 'human being' wasn't applied until a child was two, or four, or pubescent, or in his/her twenties....and some societies where women never WERE considered human beings. My own nation at one time only allowed a slave to be 3/5 of a human being.
"Human being" and "person" are NOT scientific labels; they are societal and legal labels, just like 'murder' is a LEGAL label, not a scientific finding of fact.
However, 'human' and 'life' ARE very much scientific labels that we can identify and count on, specifically.
A human zygote is HUMAN. It isn't anything else. It is the product of the combination of a human sperm and a human egg.
A human zygote is ALIVE, with its own unique physicality, dependent upon its mother, but separate from her. This zygote may not have the same blood type, certainly has different DNA, and will absolutely not grow up to be a clone of her.
A human zygote is ALIVE, because, well.....it can die. It can change state to 'dead.' What was it before it was dead?
SCIENCE says it was alive.
Ergo, it is a human life which, if allowed to grow and develop naturally, will BECOME that magical 21 week old fetus, unless it dies first, or someone kills it first.
..........................................and I find your argument that abortion should be legal because the foster care system is bad to be...
it's exactly like claiming that the solution to over crowded schools is to shoot half the first graders before they start classes.
Exactly like that.
The solution is to fix the system, not kill the victims of it.