It's easier to embed 100,000 falsified or illegal ballots across 100 counties than 10. In some states there's a minimum recount margin that only triggers an audit if X% are inaccurate.
Furthermore It's easier to drop more ballots for a Democrat in a Blue county because nobody suspects an abnormally high turnout for Biden. If it hadn't been 96% but something more reasonable like 70%, we probably wouldn't have noticed. Keep in mind Trump won 14% of San Francisco and they were trying to imply Atlanta & Milwaukee had a more liberal batch.
It's easier to embed 100,000 falsified or illegal ballots across 100 counties than 10. In some states there's a minimum recount margin that only triggers an audit if X% are inaccurate.
Furthermore It's easier to drop more ballots for a Democrat in a Blue county because nobody suspects an abnormally high turnout for Biden. If it hadn't been 96% but something more reasonable like 70%, we probably wouldn't have noticed.