I think Ms Streep is like a friend I have in the local police.  She's never been hit on at work or faced any sexual harassment herself so she has a difficult time believing it happens to other women. After I told her about my experiences, in another field, and pointed out the difference in attention that we received every where else (restaurants, walking down the street) she relented a bit or at least didn't want to directly accuse me of soliciting bad behaviour, like she did of other women.  The  "it doesn't happen to me, so I doubt it happens to others" mindset of many women is a large part of the problem.  Add in the ones who are willing accomplices who willing do whatever it takes to get ahead, we've got quite a bit to change in the current system that both men and women need to be a part of.