It sounds like you are saying that the SMBus is actually necessary for regular Intel operations and is installed by the chipset / MEI drivers but without a separate entry in the list of programs.
And Desktop Utilities, for some strange reason, installs it again but with a separate entry in the list of programs.
So I could just leave it the way it is.
Perhaps an Intel employee could explain why the Desktop Utilities installs it explicitly when it already exists.