I think that being mostly super old, they operate almost as half-dead automatons who default to the same procedures and canned lines they relied on daily when they were decades younger, even though their toolkit is completely unsuited for politics in the current moment. It's why Dianne Feinstein mumbled a bunch of shit to the Sunrise Movement protestors about how she knew how to get things done better than those kids, and that they should let her work, only to go on to do nothing to combat climate change, and then die in office.