For heaven's sake man, are they not pilots?! Do we actually have to tell them how to keep an aircraft level? Are they truly automatons? Those variations are non-events - child's play. Does the point your making not illustrate the very problem at hand? Fly, do your job, for goodness sake! Stabilize the aircraft in level flight, take command, which means dealing with the variations in altitude, set the damn power and get the aircraft in more-or-less level condition in which things are known so you know where you're at and can get on with the next steps. Are we that far from being aviators?!
I understand where you are coming from and in a general sense I think your comment has validity. But I think when you apply that perspective to AF447 it is leading you astray.
There are many elements to AF447 that appear obvious
in hindsight but it's wise to remember that the crew was faced with a host of unknowns that we, today, are not faced with. Anyone who says that this accident should just have been a logbook entry is either tremendously arrogant and feeding their pride off the bodies of the dead or living in a fantasy world so divorced from reality that they are flying high, and not in a good way. Yes, the pilots should have handled this better. But lets not get carried away and pretend that iced up tubes happen every day. The crew of AF447 is not the first group of pilots to crash because of UAS issues. Responding to what happened to AF447 with an Internet tough guy attitude doesn't serve anyone well.