Screws aren't cast. And lifting the toolhead takes about .1 second.

What's expensive here is milling this screw head at all, and in particular the surface finish.

This is probably just a prototype for shows, though. At scale, screws heads are usually cold-formed, and this design would work for that, too. If you circular brush the head in the end, you'd get pretty close to this, even if you wouldn't get the finish in the pockets. But that doesn't make much sense there anyway, it'd get damaged by the fastening tool.