This is my judge/jury/executioner thing. Objectively only google decides what Google does with our data, and only google decides if they are right or wrong. "We can't be sure we're wrong" is their getout clause in the court of public opinion regarding CSAM.
Another line of reasoning i see frequently is "you don't know all the material facts" which is of course also almost always true. So the original complainant may have multiple things going on, may have been abusive, using facilities otherwise for commercial gain against T&C, had innocuous but IPR abusing files, you name it. None of this would ordinarily trigger lockout. Google just avoid having to say sorry and re-enable by handwaving "other reasons" statements.