I think there are a bunch of assumptions behind your statement that I believe are not true:

1. Latex is sufficient for all document publishing needs. E.g. converting Latex to HTML is bad to non-existent, while Typst has HTML export.

2. LLMs are sufficient for solving all problems one can encounter.

3. Things that are easier for humans are not also easier for LLMs.

4. New releases of LLMs will not learn more about Typst

At the end of the day I'm not trying to migrate anyone. Use whatever you feel is best. For my use cases I'm convinced Typst is a better option than Latex.