Even though tubes may have the most amplification faults, those faults are an easy trade off for the characteristics I value in entertainment playback as opposed to the desired clinical playback the switching amplifiers provide in my studio.
The reason tubes are still around half a century after they were supposed to be obsolete is that people like them. They like them because it is easier to get a tube amplifier to obey human hearing rules than it is with transistors. Its that simple.
So I would not describe tubes as having 'amplification faults'. If anything they have less. We use them in our studio too :)