Incorrect. They did have an open discussion; I watched parts of it. However, it appeared GOP had already decided before the meeting that they wanted to kill ACA rather than shape it. Because of that, the "discussion" quickly morphed into the usual culture-war lectures and slogans rather than bill details.
I remember trying to talk about the Obamacare legislation, before it passed. I would say something to the effect of, "I have a concern about the concept of X, and how it will be put into practice." The typical response to me would be, "Well, you're just racist, then." And that would end the conversation.