Let's assume that a manufacturing company operates in a state that has no exemption for manufacturing companies. What are the consequences of being discovered by the regulators that they are out-of-compliance?
If the company were an engineering service company, they would probably lose their corporation papers from the state, preventing them from doing business. However, that would probably not happen for a manufacturing company. Instead, that company may receive a small fine. But there is possibly an even greater penalty.
Suppose the out-of-compliance determination is made because of a planned construction of a new process or manufacturing plant. That plant may be prevented from being built if all of the engineering tasks were not performed by or supervised by a PE. The company might be forced to repeat the research and pilot studies under proper supervision. Since the patent "clock" has already gone through a couple of development years since the catalyst or process was first published, further delay can be costly.
Out-of-compliance companies also may suffer when they are recruiting. If you, a recruit, understand that the laws regarding engineering licensing are designed to protect everyone's safety, would you choose to work for a company that disregards those laws? Would you choose to work for a company that doesn't value or recognize your profession in the same manner that it values and recognizes the professions of other employees, e.g. doctors, nurses, lawyers?