Exactly. This goes also for legitimate copyright owners if there's a good case for fair-use. Content-ID claims (or DMCA notices) are free, so they just send them out with little review. But they are sure to take a second look before committing to a $10k-100k court battle. They have much more resources than you, but their resources are still limited and better spent on cases that are clear cut, or on sending more DMCA notices.