As someone attuned to subtler forms of sexism in writing, it's also really hard not to read Roberts' tone as "Those Lady Justices - so emotional! So anxious & hysterical! We Cool Considerate Men are acting from Reason and Farsight in a way that silly impulsive women of color just can't understand."
Fun fact: Richard Nixon tried repeatedly on both Broadway & Hollywood to use his Presidential influence to get "Cool Considerate Men" struck from the musical 1776 b/c he believed it was anti-GOP, & Jack Warner cooperated & struck it from the movie until 2002. Now Nixon could imprison Peter Hunt.