It took me a moment to figure out what you're saying came from the book and what didn't; for the benefit of others (and also so you can correct me if I misunderstood) may I make what I think you said more explicit?

• You and your partner would need to adopt in order to have children (not because of anything you read in the book; I guess both female, or one partner infertile, or something of the kind, but it's none of my business).
• If you do, then because (at least according to the book) parental behaviour has negligible impact on success of children
  • (because that actually comes down to genetics and environmental things parents don't get to choose)
  • ... they likely will be substantially less successful than would be expected for people as clever as your partner.
• Your partner would likely
  • be upset about this, and
  • (despite the lessons of this book) try to push these children to greater success than they're likely capable of.
• This would make everyone miserable, so it's best for you not to have children.

I have to say, looking at what you've written, that actually it seems like having children would be a whole lot of No Fun for you and your partner even if everything in this book is wrong -- because your partner would want to push them to succeed while you have a "very strong aversion" to even nudging them. It seems like such a major disagreement over how children should be raised would suggest not having any, regardless of whether your preferences or your partner's fit the evidence better.

(I feel uncomfortable making such personal remarks about a couple I don't even know. My apologies if it makes you uncomfortable too.)