The reason it's inevitable is because because it follows from physics principles. The Bekenstein Bound proves that all physical systems of finite volume contain finite information, humans are a finite volume, ergo a human contains finite information. Finite information can be fully captured by a finite computer, ergo computers can in principle perfectly simulate a human person.

This + continued technological development entails that AGI is inevitable.

Although the reasoning is clear, you (and her) jump from "possible in principle" to "inevitable in practice".

Just because something is physically possible doesn't make it "inevitable". That's why it's just a fantasy at this point.

As I said above:

> This + continued technological development entails that AGI is inevitable.

Everyone takes the above as a given in any discussion of future projections.