It all comes down to how we understand the term “human”. The phrase “they alone” is ambiguous, and does not rule out interbreeding.
We are just disagreeing about the use of the term “traditional.” I think the genealogical Adam (with people outside the garden interbreeding wiht their offspring) is a traditional view of Adam.
We can talk about how to adjust the language to be more clear. Would you like to take a shot at it?
We both agree that Adam and Eve as sole-genetic progenitors, 10,000 years ago, is not consistent with the evidence.