Because you don't understand what an insurrection is, clearly. Why you are trying to play semantic games when you don't bother to learn the definition of the key term here is beyond me.
There was no power to seize on jan 6th either, at most they would have lynched a few politicians not taken control of the state. lol. Lynching Pelosi and Pence would not have changed the command structure of the military. If Pence had taken action that would have been a legal battle...Nothing close to an insurrection.
Here is the criminal charge under US code
www.law.cornell.edu
Here is webster's definition
an act or instance of revolting against civil authority or an established government… See the full definition
www.merriam-webster.com
Basically anything that involves messing with any federal duties is an insurrection against the feds....Local cops local government. State cops state government....ETC
Like the word "terrorism", insurrection is so vague it's basically meaningless. They stopped calling it a coupe because it obviously wasn't a coupe. They settled on insurrection which fits but can be applied to literally any riot.