It's absolutely ludicrous to assume what the pilot was dealing with, based on the recording. Idiotic. Especially for an NTSB board member or investigator.

Obviously the pilot's attention was committed to something; his responses were truncated, slurred, and clearly he was task saturated with something. Until the investigation is complete, it is entirely irresponsible to guess as to what it might be.

A significant income has proven many times over that simply because a well-paid attorney or physician can afford an aircraft, does not mean that he or she spends the time or effort to gain and maintain proficiency. The most dangerous component in the aircraft continues to be the pilot. Whether it's exhausting fuel or the pilots operational capabilities, the end of the line insofar as a pilot's abilities is the depletion of airspeed, altitude, and or ideas, often in close proximity to one another. This may have been aided by a mechanical malfunction, or simply a pilot so task saturated by scanning, interpreting, and correlating the inflight data, that he couldn't keep up. It's not a hard place to reach, in an airplane, and the pilot in the audio recording was barely able to formulate a mumbled response. Most of us will easily recognize the voice of someone whose attention is so consumed by a demand that the pilot can scarcely reply. Whether that demand, in this case, was caused by instrument loss or another problem, or whether the pilot was simply in over his head in trying to maintain control of a flyable airplane, will come out in the wash. Until then, speculation and guesswork is unprofessional.