> It's also prone to the risk that the LLM gets something wrong: makes a part that is prone to failure, or will actually destroy a CNC, or be unprintable by a 3D printer, etc.

You can destroy 3d printers too... especially if you get the bright idea of generating gcode... and one might reasonably get this idea since so many factors matter like the settings (but can easily result in things like ASA poisoning...)

It's a real "too clever by a quarter" thinking