Why work for a CEO that "doesn't care and is not interesting in your explanation about how optimizing the termocouplers makes thing better"? There are plenty of companies run by people that do understand the low-level details that make their businesses successful. Work there instead.
Remember, they need you more than you need them. They already admitted that they don't understand their own business!
I agree, which is why I wouldn't work there. But that is the reality many face in our industry. Not everybody works at a hip startup. Many work at those "enterprise" places.
Remember, they need you more than you need them. They already admitted that they don't understand their own business!