For users coming from another desktop environment (or even from another OS) it would be easier to find system information and specs in the system settings. Therefore the KInfocentre should be integrated in system settings.
I thought I already saw that in some distro, cannot quite remember.
Technically it works on the same system. Putting modules from one in another is just a one line change in the module. But they're split for a reason. One is viewing, the other is setting, they're not remotely related tasks.