IMO the average voter is quite in-line with Rogan and Theo Von culturally (more than they are with Trump or Harris, for that matter) and so for Harris to skip those was a major misstep that just further made her seem like an aloof member of the DC/Coastal elite.
Biden didn't have this problem because he was more of a blue collar/middle class guy from Scranton and despite his gaffes, was more likable by the average person.