I disagree. We are no more not part of the evolutionary cycle than we are not part of planetary climate change. (Pardon the double negative).

Evolution is no more than genetic drift within a population through reproduction and variation shaped by selective pressure. What you describe as gene therapy could be seen as a selective pressure. But there are many selective pressures on large populations of humans and these selective pressure vary from one set to another. I do agree that the dynamics of selective pressures has changed for humans thanks to modern medicine. But I contest it still applies.