Beyond the obvious examples like Buttigieg.
Imagine being one of the most influential American Marxists of the twentieth century, then having your son get a job at the Soros foundation, then he later writes a hagiography for fucking Alexander Hamilton
It's one of those things where you can predict with incredible accuracy what 90% of a group of people will do, but if you're looking at an individual from that group there's no way to tell if they'll be in the 10% that do something unexpected.