I can't imagine wanting to let a simple task be handled by software that could easily make a mistake or corrupt my system. Some OEM systems include a utility to monitor their website for drivers, but even then, it can cause issues, or unwanted changes.
Updating drivers is simple. You just get the newer files....remove the old version, and install the new version. The Update button you see is for a manual install...where you point Windows to a location to find a specific, newer driver for a specific piece of hardware. It really doesn't need to be used unless you run into an issue with the installer. For Nvidia, as an example, if a newer driver exists, download it, remove the old version, and then install the new version.