We disagree on the predictive power of twin studies.

Also please cite actual studies rather than Wikipedia. You’ll capture more nuance.

We conclude that there is now strong evidence that virtually all individual psychological differences, when reliably measured, are moderately to substantially heritable

For example, citation 6 implies nearly every personality trait is inherited, which seems aggressive to me.

Citation 7 is a book about how the genetic links get stronger with age, which seems also odd to take at face value.

Anyway, as great a source as Wikipedia can be, I wouldn't take its summaries at face value.