Think of the nicest sound you know. A well-tuned instrument performing a delicate melody, a passionate singer performing their heart out, a cacophony of songbirds. That's what my good noises sound like when done right.
Obviously nobody wants to hear a fart can Honda Civic at 4am, but a fantastically engineered Italian V10 has its own melody that can't really be replicated otherwise. These examples will be missed, and the survivors will be sought after like a vintage violin.