Consoles have OSes that allow games to run more directly on the hardware. That is, the game itself does not have to ask the OS for hardware access or the access routines are much more streamlined. Games are more or less trusted applications, so they can get away with this.
PC games on the other hand have to talk to the OS constantly to access hardware. In a general purpose computer these days, pretty much all user applications (i.e., not OS components or drivers) are applications that cannot be trusted with easy access to hardware or system resources.
As an aside, despite what people call DX12 and Vulkan as "close to metal" API, they are not. All they did was shift the burden of some things to the application itself rather than on the API. As well as redoing some concepts to make processing instructions to the GPU more efficient.
Benzene reacted to Mira Yurizaki in PS4 converted to PC? Is it possible?
