We can only begin to judge people as individuals once they have gained agency and self-awareness. If we're going to turn the argument into a contest of silly clichés, then how do I know whether a given fetus is going to grow up to become the next Jobs or the next Hitler?

You can't define a clump of cells as "good," "evil," or, indeed, as "human." Your own holy book makes no attempt at doing so. If you insist on enforcing your unsupported opinion at gunpoint, it can only happen at the cost of our own free will... just as seen here.