I have two problems with this automatic installation of updates:
1) I don't always want the latest GPU drivers. I prefer running on a driver that has been verified stable by myself, and I only upgrade when it's needed for significant performance fixes / new features. I don't want Windows to automatically update my graphics drivers so I can encounter all of AMD's and Nvidia's new TDRs, broken features and BSODs.
2) I want to control when the updates are installed. There is nothing less annoying than playing a full-screen competitive game (be it CS:GO, League of Legends, etc.) and then dying because of Windows suddenly throwing me to desktop to ask if I want to restart because Windows installed some updates. Seriously, happened multiple times in the past and since then I've always used the "Notify me but don't install automatically" option.