Bad analogy. Sam has no stock in OpenAI or any sort of formal controlling interest. His power is solely informal: his own talents and abilities and the loyalty of the other employees. Regardless of the truth of the matters, the episode is a perfect example of the limits of formal authority and how informal or "soft" power can be even more effective in shaping events
The point is that board coups are a concept that people are already familiar with, so its not surprising that they thought of it when this similar situation happened.