All rhetoric?  Obviously not.  We're talking about the rhetoric used by pro-lifers in their opposition to abortion.   As to THAT rhetoric, cite me an example that falsely exaggerates the real gruesomeness of abortion, or that falsely portrays its wrongness.  I was a young man when Roe v. Wade was decided, and my first reaction was to cheer.  I then came to understand what abortion entails.  No "rhetoric" used by anti-abortionists fully convey horror and gruesomeness of that act; so yes, it is valid, in that it does not overstate the truth, and if understood and embraced, should cause hardened hearts to soften to the reality that these are defenseless human beings killed by the most gruesome means imaginable.