It is very simple to me. When many believe including those in the Feds, that January 6th was a grievance that got just out of hand there is no need to show there were plans.
I was telling my landlady for two weeks that there was to be a coup attempt on January 6th - it was all over social media. What exactly are we getting for the billions we spend propping up homeland security if they can’t out-intel slackers on the couch?