Go back and read the transcript. She made it explicitly clear that her personal opinion means nothing, and that it is McCain's opinion that will be carried into policy.
In other words, her political capital is being expended to support the destruction of human embryos.
If you, and all the other conservatives who are now so hot to ride on the McCain/Palin bandwagon, would be truly honest with yourselves, you'd realize that yours is too. This is the practical reality.
That says nothing more than that she recognizes the difference between the Presidency and Vice Presidency. Do you?
Palin’s personal opinion means a lot, because she could be POTUS some day, and she will be an important advisor to McCain.