IF it's true that people are forced to work 12+ hour days 6 days in the week for months on end than that is genuinely fucking awful,
I mean, no one is forced. Slavery was abandoned some time back.
"Forced" doesn't imply physical force. For example, an employer that is aware that changing jobs or finding a new one would be an extreme inconvenient or very difficult for employee X, because that employee is dependent on the wage he makes to support his ill mother or family member, who is getting their treatment at a nearby hospital. All it needs to be harassment is for the employee to say "either you do extra hours or we're penalizing you in X manner".
In this case no one is literally forcing anyone to do anything, but the powers at play are so in favor of the employer that, for all intents and purposes, the employee is being forced.