The straw man was the 2 obvious statements she made (sci-fi has more than science, technology is more than computers and whatever). She argues for both, when nobody was arguing against, then says; therefore I write (hard?) sci-fi.

> therefore I write (hard?) sci-fi.

This is not at all what Le Guin is saying! It's right there at the end of the essay: "I agree with my reviewer that I don’t write hard science fiction."