Gillibrand is about as sincere as Stephen Colbert playing a conservative. I.e. Zero. And she is a ditzy bimbo. Elizabeth Warren is sincere. She's a commie, but she is sincere.
It isn't a woman thing though. Woman, man, black, white, democrat, republican.....sincerity is a rarity.
And the the ditzy bimbo thing isn't limited to women either. Other ditzy bimbos include Pelosi, Boxer, McCain, Hoyer, Rubio, and many more.