I think there's still an underestimated burden to vibe-coding an app for a non-software engineer. I'm not recommending my parents vibe-code apps to solve problems, so I think the market is smaller.
But Roberto's use-case is definitely more sane than most.
With the current tech, I agree this will still be pretty niche. I'm vibe-coding my own iOS apps, and it still needs a decent understanding of the tech and a willingness to put up with a lot of rough edges.
However, with a proper framework (e.g., a very opinionated design system, the ability to choose from some pre-designed structures/flows, etc.) I could very much see ad hoc creation of software becoming more widespread.