Couldn't you say the same for every moral conviction. But we must impose or morals on others at times. That's what laws are.
"If you are so against slavery, don't buy a slave."
You see, it's not so simple as that either.
As for vasectomies and such, I am perfectly happy to allow someone to choose any method to avoid pregnancy rather than terminating the actual life that has since been created. I am completely for the father being required to take far more responsibility with regards to the child after birth. I am okay with more options being provided for mothers and the adoption process becoming more streamlined.
And I'm married and get laid plenty. If we get pregnant now, it would economically be very difficult for us. But neither of us would consider our lives ruined, and certainly wouldn't consider ruining the child's life an option to ease our lot.