Friendly reminder to everyone: What is pictured in this image is not a molotov, but a self-immolation device that is likely to explode in the hand.
A molotov, on the other hand, consists of a sealed bottle of fuel with a flaming cloth wrapped around it, which prevents ignition of its contents prior to impact.
I think the point you're missing is that without the monetary incentive that arises under capitalism, there would be very little drive for anyone to build these wasteful AI systems. It's difficult to imagine a group of people voluntarily amassing and then using the resources necessary for "AI" absent the desire to cash in on their investment. So you're correct that an alternative economic system won't "magically" make LLMs go away. I think it unlikely, however, that such wasteful nonsense would be used on any meaningful scale absent the perverse incentives of capitalism.