Your interpretation of Exodus 21 has been addressed ad nauseam, and your opinion is incorrect.
If men strive, and hurt a woman with child, so that her fruit depart from her, and yet no mischief follow: he shall be surely punished, according as the woman's husband will lay upon him; and he shall pay as the judges determine. And if any mischief follow, then thou shalt give life for life, Eye for eye, tooth for tooth, hand for hand, foot for foot, Burning for burning, wound for wound, stripe for stripe.
The passage is saying that if the pregnant woman gives birth to a living child and the child does not die, then the man will be punished. But, if the woman gives birth and the child dies as a result, then the man will pay life for life. If you look at the Hebrew you'll find that this is the correct interpretation.
And I have to wonder if people who try to use the story of Adam's creation actually take the time to even read the passage. First off, Adam is a unique, one off creation and is not the standard for how human's come into existence. It is a special circumstance, not a standard.
Secondly, absolutely nowhere in the passage does it say that Adam came to life when HE took his first breath:
Then the LORD God formed man of dust from the ground, and breathed into his nostrils the breath of life; and man became a living being.
The picture here is that God creates a body. God, Himself, then breathes life into Adam, and then Adam came to life. Meaning, Adam probably came to life before he actually took his first breath if we're actually picturing what this looked like.
I wonder then, if this is your position, are you of the mindset that it would be morally acceptable for a woman to have an abortion at any time during the pregnancy, so long as the child has not yet taken a breath of fresh air?