AI isn't about jobs and efficiency, it's about having a stronger position over labor. AI is useful, in most cases this makes existing labor better. The number of jobs that can be actually automated by it is much lower than people percieve. But the narrative is what matters. The temporary displacement and uncertainty of labor is what matters. It creates a weaker position for labor.
Is this worth >1 trillion in capex?
For reference, less than 100 billion have been invested into fusion energy — since 1950.