The more modern ones don't have the whine.
The wining is usually coming from the folks stuck on the ground that have this misguided belief that all aircraft should be immune to the laws of physics (and never break down).
Even if you throw all available resources into maintenance (as airlines like Japan Airlines do/used to do) and start to go broke in the process, you will still see failures (not unusual... as those aircraft have a million parts to break in them).
What I did notice over my years in the industry was that the scary airlines did seem to get their aircraft out on time, just as often as the good ones, because they were willing to fly their aircraft with masses of unserviceabilities (and their interpretation of Dispatch Deviation Guides was less than perfect). Qantas engineers work on a number of different airlines and they've grounded quite a few foreign operators' aircraft that the operators thought were ok to fly (and weren't).