This presupposes that a company's competitive advantage comes primarily from their CEO.
It also presupposes that success is zero sum and winner takes all, which isn't always the case (example: when you're building out a new market segment, it can be beneficial to have competitors that are also building it out).
It’s the premise of the thought experiment: to be able to make a profit, the AI executor must achieve a competitive advantage in the market. If the AI doesn’t generate a profit, then it doesn’t fit the premise and that’s a different experiment
I suppose you can claim that a profit can still be generated by offering a holistically worse service/product with no single advantage than a competitor because markets are not efficient, though this may be short lived