This defense of the "manifesto" is flawed just like the others. It picks out a small subset of the claims made in the document, discards the context and all the other claims, and then harangues us for having a problem with "science". I could argue "water is composed of two hydrogen molecules and one oxygen molecule, so women are bad at software development", and my argument would just be a difference of degree worse…
Well said, it's a massive leap to go from biological gender differences to differences in aptitude for engineering. The gross oversimplified claims from the document that attempt to make this leap are textbook stereotypes.
For the n million-th time : the memo said nothing about aptitude for engineering, just preference.