I agree that the phenomenon is much more complex than conspiratorial movie villains, and it's unproductive to simplify things that way (often out of anger). But I'll add some complexity to what you said: They would be wise to ask for less because that is what the market will bear, due to widespread discrimination.

It seems beyond debate that discrimination is widespread, though again I agree we need to understand that simple statement in detail. The black, female, Latino, etc. candidates would have to be deaf and blind not to be aware of it, and would need unusual courage to try to ignore it.

Anecdotally, I was at dinner with a retired female biologist. She was discussing the challenges of being a female scientist in her generation, and how today's women in science take their opportunities for granted. Later in the meal, she told me that women are naturally worse at math and computer science, and that males of northern European ancestry are naturally superior (which flies in the face of even current discriminatory hiring in IT). It wasn't anything I haven't heard before, unfortunately; even in my personal experience, explicit discrimination is not so rare as to be shocking.