Leftists fight as hard as they can for an insecure and unverifiable voting system, so it's not surprising that audits, cases, etc. find little fraud. That's the entire idea, to make it difficult if not impossible to find!
1. Unfalsifiable claim.
2. Reversed burden of proof.
If fraud is real at meaningful scale, you show it. You don’t assume it, declare the system rigged, and treat every failed audit or court case as part of the conspiracy. That’s not analysis. It’s a closed loop designed to protect the claim from scrutiny.