There will be a whole industry of people who fix what AI has created. I don't know if it will be faster to build the wrong thing and pay to have it fixed or to build the right thing from the get go, but after having seen some shit, like you, I have a little idea.
That industry will only form if LLMs don't improve from here. But the evidence, both theoretical and empirical, is quite the opposite. In fact one of the core reasons transformers gained so much traction is because they scale so well.
If nothing really changes in 3-5 years, then I'd call it a flop. But the writing is on the wall that "scale = smarts", and what we have today still looks like a foundational stage for LLM's.
If the difference between now and 6 years in the future is the same as the difference between now and 6 years ago, a lot of people here will be eating their hats.