You’re basically taking an error that is randomly distributed, but then partially correcting that error only from pools that you know skewed your way to begin with.
Imagine if Trump had initiated hand recounted undervotes (votes the machine couldn’t count) only for election day votes but not mail in votes. That would be election fraud, because it would be calculated to find additional votes from a pool that skews GOP while not finding additional votes in a pool that skews Democrat. What Gore did was exactly the same thing.
People scream “election interference” at these highly attenuated and indirect actions like Meta taking down a post. But Gore was statistically minting additional Gore votes before two Supreme Courts stopped him.