In step 3 all that happens is that Youtube sends a second request to the original bot asking if they are correct. All of the bots immediately return yes. There is no penalty for the media cartel lying to YouTube so they don't even care.

For the cartels the decision tree is simple. Issue a demonetization claim and take the money for the channel. Doesn't matter if they own it or not. If the user successfully contests it then you're just out the money going forward, but nothing else. There's literally no reason for them to act ethically, so they don't. If YouTube does push back they have the weight of Copyright Law to bring down on YouTube, making even relatively small violations worth potentially trillions of dollars in damages.