If one worker finds that they can achieve a competitive advantage by working more hours, then other workers will copy that strategy. They may have to copy that strategy whether they want to or not, just to get jobs. Suddenly, working overtime is no longer the exception, it's now the norm, expected. And in that situation, the workers don't benefit, only the employers benefit from the expected overtime work. And then you have a culture of overwork and burnout in the industry. Employers may not care, because they can exploit you for a few years, until you burn out and are incapable of working any more, at which point you quit or get fired, and the employer moves on to the next employee. This situation is not to your long-term benefit at all, because you have to take a lot of time post-burnout making no money.
This is why all workers need to take a stand and not allow employers to exploit them, not to agree to work unreasonable hours. Your career — indeed your whole life — is a marathon, not a sprint. Trying to run a marathon in a series of sprints is not an effective strategy.