Earlier quoted context omitted.
I think his failure was just naivete. He thought Google wanted legitimate feedback or would support intellectual honesty over popularity. That was wrong.
I mean, the authors of some of the studies Damore cited came out and said that he was misrepresenting them and that they disagreed with the conclusion he drew from them.
However, just because the science is not settled on the subject does not mean one cannot put forth a reasonable hypothesis.
And for the record, the idea that these sex differences have no influence on inclinations towards these specific jobs is also a hypothesis.
Damore may be wrong about the nature of that influence, but I think most people would be surprised if the "no influence" hypothesis was true.