Who said we can't automate truck driving? Of course we can. It's the balance of safety/cost that prevents to fire all truck drivers right now.
In programming it's different. Cost of mistake is negligible for most projects. Worst case is your production database is dropped, so you have some downtime while restoring it from the back up.
If some AI will be able to actually replace even junior developer, it'll be widely adopted. May be not for martian missions or artificial heart, but for some boring CRUD service - any day.
An issue is that so far GitHub Copilot is the only widely known AI attempt to tackle code generation. And while it's promising, it's far from replacing a human. It just can't write useful programs. While automated truck driving is absolutely a thing for many years.
