Just from the overview of that wikipedia page, it’s clear she has been subjected to a horrific amount of abuse and emotional turmoil, both as a child and later as an adult. It seems extremely dubious whether you can really draw any general conclusions from such an extreme case study.
How could a child not be exposed to any spoken language without that circumstance also being somewhat traumatic?
Did you read the Wikipedia article? I grant that isolation is inherently traumatic, but by itself, it pales in comparison to what that person went through.
I grant that isolation is inherently traumatic
That was my point, I don’t see how a traumatic experience during a child’s formative years could have no effect on their ability to learn or socialize later in life. I’m not making a “nature” argument, I’m making a “lack of nurture during the most important years” argument.