Personally, I'd just disable and ignore it unless your PC is serviced or maintained in a work/office environment and controlled by an IT department. Intel Management Engine Interface and the PCI Simple Comm Controller allows your computer to be controlled and updated by a central maintenance location. And it can do this even when the PC is shut down. (But still plugged in with PSU on.) The feature is built into Intel chipsets along with firmware and software. There's some fairly large overhead for it even when it's not in use. I'm not sure why Intel chose to install this "feature" on all PC chipsets even if it's a private PC but it's there. To me, it's just another hole into my personal property and a security risk.
For the last few months, I've been trying to find a way to disable the PCISCC but apparently, no one else is too worried about it. It's part of the hardware and as such, can't be disabled except to remove the drivers and software. So that's what I did along with hiding the Windows update for it that kept showing up. It shows up in Device Manager with a warning sign but I just ignore it and feel safer with it that way.