You can start a thread focused on your view, or a focused question.
Or are you asking me to flesh out my view? Briefly, I think that original sin is complex, with several distinction components to carefully separate out. Each component transmits in different ways, but at least one component is transmitted by natural descent. In our current moment, we are all subject to all components of original sin, but in the past there would have been intermediary categories.
If you like, I can map what I am thinking on another thread. Perhaps you can help me make it more coherent.