The theatrics of OpenAI’s seeming implosion amid the firing of its CEO and co-founder Sam Altman, Microsoft’s dramatic offer to poach its top executives and staff, and Altman’s triumphant return following the ouster of the board has all the trappings of a Hollywood blockbuster. But the drama unfolding should put the spotlight on the tyranny of the tech titans that control critical aspects of the AI ecosystem. OpenAI has developed some of the most advanced large-language models and pioneering artificial-intelligence products, such as the text generator ChatGPT and image generator Dall-E, which have been responsible for making generative AI into...