That's where it breaks down for them since they've never thought it through. They just know (or more precisely have been told) that democracy was almost lost that day. And many of these are supposedly "highly-educated" people.
Nobody cares about J6 after the Summer of 2020 riots, which were far more deadly and destructive, and had long-lasting terrible consequences. As you said our democracy was never in any danger and the Capitol is more secure than ever, while hopefully they'll take these gatherings a bit more seriously in the future.