Because I don't want to have something running full screen only to have the update window quietly popup in the background to auto-shutdown my system in 10 minut

Because I don't want to have something running full screen only to have the update window quietly popup in the background to auto-shutdown my system in 10 minutes. Because I don't want to sit around for 10 minutes waiting for updates to install before I can pack up my laptop. Because I don't want to arrive somewhere ready to work/play only to have an additional 10 minutes and 2 restarts tacked on to my boot time. Because I don't want to have random lag spikes nor frame drops in games as my system decides that now is the perfect time to download an update. Disabling automatic updates isn't stupid if you're willing to manage them in a sane manner.