I was watching a PBS panel discussion among four women (nary a man)
about why newly hired women scientists get strong evaluations yet half
of women scientists stop working within the first few years. They
offered only three explanations: machismo, sexual harassment, and
employers not accommodating to employees' motherhood.

Why did none of the panel members mention any of these, which I have heard again and again from my women clients:

• Many women soon tire of the rigors and isolation of scientist work. Indeed recent research finds that women, on average, just aren't interested enough in science to make a long-term career out of it.
• They end up valuing being a mother more than working outside the home.
• They find it easier to be a stay-at-home mom.

As always in the mainstream (read "liberal") media, it's easier to just blame men.