A lot of the people who post online have no experience with the paid PCB tools and those tools already have quite a lot of automation, and the automation interfaces work between different CAD & EDA vendors. Shared, hierarchical, and repurposed schematics are also totally a thing.
I spend almost no time on boiler plate stuff. And with good constraints, which require serious thought and understanding, tons of routing & checks can be automated too. Right now.
So, IMHO, there is not a lot of fat in the process for AI to automate away without a lot more EE and physics models, and the ability to interpret multiple specs, built in. And the current AI tools are very far from that.