I reject the premise of your question, which is that the Left is capable of any form of reasonable debate or introspection. They are not.
True. They are entirely driven by radial ideology, hate, and blind emotion rather than reason or what is considered good and decent. They are literally sociopaths with no sense of remorse or conscience.
Their hard line adherence to the belief a child is not a child until sometime after it's born is proof enough for this statement and I do believe there is room for compromise on the abortion debate.