this affidavit is not meant to corroborate that fraud was done, just that fraud can be done. You have to first show that an expert says fraud can be done so that they cannot refute it and be unchallenged in their refusal. Once that is established, you can then start presenting evidence of fraud being done.
Does that help make it clear what this affidavit's function is?
This above is exactly the reason why Sydney Powell is an inept election law attorney. Apparently she also believes the above.