Their intent and what they say is an objective fact. What you say about embryos that contradicts them is subjective.
But if I say something about embryos that supports them, that's not subjective? You're babbling.
The nature of the embryo is at least as objective as their intent and statements. They can no more make a non-child a child or vice versa through intent or statements than they can make a dog a cat or vice versa through intent or statements.