It's been a while since I've read his original memo, but wasn't one of his arguments that women excel in more team based environments, and he suggested more pair based programming as one potential solution?

So an overly simplified argument might be women don't work in tech because they both prefer, and are superior in, different working environments.

What you should take away from his quote is nothing. Especially the paraphrased portion of the quote that ignores preferences. Read his memo in it's entirety and judge it in it's entirety.