A common factor between video games, Hollywood, and many other successful unions is that the supply of potential workers outpaces the amount of jobs available. This is the reason why general tech workers are treated better than people doing the exact same thing in the video game industry, because video games are just "cooler" and people are willing to sacrifice to work on them. This shifts the balance of power into the employers favor and allows them to enact policies and standards that are difficult to endure. Unions are a great way to shift that power balance back to neutral or even in favor of the workforce.