Useful AI, as in good pattern matching for science and engineering are already benefits.

LLM and genAI slop will never be a net benefit to anyone other than cheapass executives and shareholders because their models are fundamentally dogshit. Both just regurgitate shit they were trained on and their massive cost overhead currently being covered by investors will never end up being profitable. They can't learn anything new without the massive training costs and that will be a perpetual cost based on their design.

Plus if they are as successful as they are marketed to take all the jobs the economy would collapse since nobody would have income anymore. This isn't comparable to automating manufacturing or farming or other industries that output physical goods. This is automating paperwork and advertising which doesn't matter if nobody is working.