Roe v Wade

Yesterday in a landmark decision the Supreme Court stated that abortion decisions where not the federal government’s responsibility, since it is not in the Constitution.  They referred the decision to each individual state.   If Indiana decided to ban abortions it is the states right to do so, while Illinois may have abortions.  The consisting side stated that the federal government has no jurisdiction, while the states do.
 
Therefore, if you want an abortion, you will have to go to a state that has legalized it. 
 
My question is simply this, why kill a baby?  What did that baby do to deserve death?  There are people who can not have a child that would gladly adapt one. 
 
I know that the the overall chant is that it is a woman’s body she should do with it what she pleases.  Yet there are drug laws which dictate what a person can put into their body.  There are prostitution laws, that state a person cannot sell their body for sex.  One can not over intoxicate their body and drive. 
 
I just do not understand why a woman would kill a baby?  What did it do to you?