Many stories about mail-in voting in the mainstream media have one thing in common. They invariably contain a statement similar to “Trump has repeatedly alleged, without evidence, that expanding mail-in voting will lead to massive fraud…”

I think the stories are basically correct. No evidence of significant fraud has been found.

However, the claim by Trump is about the future, not the past. The ONLY protection I can see against fraud is a signature match.

Signature match, whether done manually or by machine, is not a sure thing. See, for instance:https://www.reviewjournal.com/opinion/opinion-columns/victor-joecks/victor-joecks-signature-verification-is-a-joke-heres-how-i-beat-the-system-2072456/

So my question is: Why is mail-in balloting not considered MORE prone to fraud?”