There's nothing wrong with wanting "set it and forget it" functionality, but...
Some might say it's a good idea to use the "Ask when an update is available" setting anyway, then do a bit of research before just going ahead once it notifies you.
Imagine, for example, that you were to see a new update available, browse over to this forum, and spot a lot of posts claiming "the new update doesn't work" (not that this happens very often, but what if). You might choose to delay the update in order to have uninterrupted service from your computer.
Or you might know that in the near future you really, really need your computer, and would rather not risk applying any software update for a few days until the need has passed. Usually they go OK, but again, what if.
Just some thoughts.
-Noel