Realistically this doesn't mean all pure designers go away. Large orgs can have a small team that set the overall style guide and designs important pages, and the rest of the org just follows using AI to iterate.
That's the kind of question you will have to ask if you don't hire right. I get collapsing frontend/backend and PM/UI/UX but two then collapse code and product may be a bridge too far.
Teaching programming is a bit of mostly solved problem, today anyway.