In the US capitalist context, it's certainly inevitable, because AI is the biggest and most attractive source of profit and power out there right now. In that context, the broad strokes of what's happening currently, including the financial bubble, are predictable and inevitable.
What are the concrete steps which would allow us to "easily stop this train"? And why haven't we used steps like that to stop other cases where obscenely wealthy people have screwed everyone else over to increase their wealth? Is public control of the means of production involved, perhaps? If so, your definition of "easily" and mine are incompatible.