I get what you mean, and it’s a common thought and strategy. It just doesn’t work as well as one might think. Unless there is a union, employees are at a significant disadvantage. Forming a union would be FAR more effective than quoting OSHA regs.

The main thing is regulatory violations aren’t (usually) criminal so there’s a long administrative process to most enforcement actions. Companies overwhelmingly have the resources to litigate beyond their employees means. So if they have the resources to have legal council or a compliance officer, there likely needs to be a well documented paper trail of concealment or otherwise flagrant disregard or denial of improved conditions.

There not being A/C isn’t enough. Refusing requests to install A/C is better. The company removing workers fans to make a point goes further in a case. Then putting out an internal memo requiring zero ventilation and to lie to investigators is a strong case.