Yeah, true in many cases. The post was about Cameron so that’s the only director I’m addressing at the moment but the industry is definitely filled with people using their “art” to excuse their bad and often abusive behavior like you said. There’s a lot of very concentrated power to abuse.
They can argue against the employer’s claim and prove they weren’t fired for cause. My former employer lied to unemployment and and it worked in my favor. Either way they can appeal a decision and should start consulting attorneys immediately.