Arnold
Your theory is interesting...and probably as likely as any other theory going around right now.
Standard Operating Procedure requires that in the event of an emergency, the Pilot immediately "squawks 7700" which is the emergency code on the aircraft transponder...his lets Airtraffic Control know he has a problem.
Next, the Pilot is required to "Aviate, Navigate and Communicate"...and it must be in that order. So he will be busy attending to flying and navigation prior to verbally communicating the details of the emergency via a spoken message or an SOS...Mayday type comment.
Never ever would a Pilot knowingly depressurise an aircraft and climb to fatal altitudes, at 45,000 the cabin Oxygen masks would be useless for breathing, the Oxygen Partial Pressure is too low, all the passengers and crew would be brain dead in about 10 minutes...this is why he is required immediately to descend to "breathable" altitudes should depressurisation occur.
So...in the event of such a catastrophic event, we would normally expect the Pilot to do an emergency descent (did not), make a course change to the nearest airfield (maybe did), squawk 7700 (did not), call mayday on ATC frequency (did not).
Not much adds up does it ??