And I totally disagree. As a man, I know what happens when we don't: We get lambasted for not caring.
We do care. We care enough to apologize and defend.
While I haven't worked with a female programmer, the ones I met socially were very competent. The female QA Testers I've worked with have been amazing. Even the female phone tech support reps I've worked with have been great. (For the record, most of the males filling those positions were better than average. I'm not disparaging them.)
The negative stereotype of women and science/tech/etc is undeserved and wrong.
But ignoring the situation is not the answer. Not-apologizing is a form of ignoring it. It doesn't help the situation at all.
Apologizing, however, shows support and that the vocal minority are just that: A minority.