This view is unworthy of feminism. True, the film must be used properly. That is why we should never spring it on an unsuspecting audience. I have found this to be true in diverse settings such as debates, banquets, schools, etc. With Christian audiences, I introduce my remarks by noting that Christ is eager to forgive the sin of abortion and that my purpose is not to condemn, but to clarify and equip.
Pictures change the way people feel about abortion, while facts change they way they think.
Both are vital in changing behavior. In the past, pro-life advocates have made one of two mistakes with graphic visual aids. When that happens, the public response is more favorable than not. You are correct to point out that many people cannot make the jump from seeing pictures of a baby in the womb to the conclusion that abortion is a serious moral wrong. That is because although pictures of pre-born babies are necessary for changing public opinion, they are not sufficient.