The Democrat Party does not want politicians who are “genuine and authentic” It wants politicians who kowtow and pander.
Somebody who just automatically ticks off a list of concessions, doesn't get very far.
For one thing, the voters on their own side pick up on the fact that they don't really mean what they're saying.
So between Pete and somebody who at least appears to be more sincere, voters won't choose Pete even if he promises them the moon.