What pilot would fly for hours after a problem, seriously ?
An incapacitated one?
And can we stop all this talk of the 'precise flight path' flown from 'waypoint to waypoint' carefully 'avoiding various areas of radar cover'.
The track is just a guess, based on a handful of satellite pings and some primary radar returns. In the absence of any more accurate information, it could just as easily be the track flown by an unconscious crew on autopilot without a heading selection, until fuel exhaustion.