If AI is a trillion dollar investment, what trillion dollar problem is it solving?

Why, the trillion dollars not yet in the pockets of the companies that think they can take advantage of AI of course.

The naked truth is that #4 answers #1. The biggest utility AI might provide would be replacing paid workers. That's a trillion dollar problem if your ultimate goal is to hoard wealth and sit atop the highest pile of gold like a dragon.

So again, we have a solution to a problem only the wealthy elite have, being marketed as an advancement for the greater good of society, to justify stealing the massive resources it consumes, in order to not have to pay that directly to their workers.

Capitalism.