Do you really feel like consumers clicking on "update" is something stupid? Personally, I think there is an expectation that the core functionality of the device will still work after an update as long as it's not beta and there are no modifications I did that caused the update to fail. As a consumer, I think that's fair isn't it?
What about things like the heartbleed vulnerability where if you didn't update there was a very real possibility that someone could harvest your data in public places? With the recent attacks at Target, Home Depot and iCloud, most consumers aren't familiar with everything that's going on in technology. Don't you think at least a few of them thought "hey, I need to update to keep my stuff as safe as possible these days"?