This sounds entirely too doomer.

There will obviously be companies that build a vibe coded app which too many people depend on. There will be some iteration (maybe feature addition, maybe bug fix) which will cause a catastrophic breakage and users will know.

But there will also be companies who add a better mix of incantations to the prompts, who use version control and CI, who ensure the code is matched with tests, who maintain the prompts and requirements documents.

The former will likely follow your projected path. The latter will do fine and may even thrive better than either traditional software houses of cheap vibe coding shops.

Then again, there are famous instances of companies who have tolerated terribly low investment in IT, including SouthWest Airlines.