The problem is that those files won't work if the GOP side of the aisle rises up in unison. If the FBI trots out files, it will only be providing good evidence of why its funding should be cut off.
On top of that, FBI credibility is in the toilet already so there's a good case to be made for not trusting their "evidence."
I'm sure the fear of having their funding cut off is why they are petrified of a Trump victory in 2024. With Trump in the oval office and Johnson in the Speaker's Chair, but FBI is in trouble.
Agree with your observations and conclusions.