correct but some folks like me and others do not want second hand control
of update software's of any kind 
I'm not sure what exactly you mean by second hand control (and whatever it is, I find it a bit absurd personally - because you are (probably?) installing virus definition updates automatically - which can change more than this emergency updater was meant to). The emergency updater is meant only for (hypothetical) cases when something (a bad program update, a bad virus definition update) breaks avast! in such a way that its unable to update anymore in the usual way. So, instead of releasing some fix on the web and telling the users to download and run it manually (which might be hard for many users) - this would be the way to deliver it automatically. So the "emergency update" is something like "emergency repair if something went really wrong".
Of course, we hope it's never gonna be used - it's there "just in case".
But as I said, you are free to remove the scheduled task, it won't affect avast's functionality in any way under normal circumstances.