Maybe "no reason" was a bad word choice. I would say that regardless of the reason, it doesn't matter to workers. What matters to workers is to have as much power as possible over their own situation. The simple calculus is that if you see another studio closing, for any reason, you recognize that this will be used as a cudgel by management and executives to work you and your colleagues even harder. When the true nature of the relationship between employee and worker is revealed, unionization is the obvious response.