Recently, an agency that used to give me work handed me an app they had built using AI.[1] But even though they had used only the best AI of the time, like Astra and Fable, in reality it had many bugs and many wrong points. If you're not a programmer, there's a lot of room to make mistakes even if you use AI. So honestly, I don't believe the claim that Fable can do everything. It's smart, and it writes code blocks far better than I do, and it writes algorithms far better than I do. But that doesn't mean it has the global consistency a program should have.

[1]https://www.makonea.com/en-US/casual/fixing-a-vibe-coded-app