And sure, perhaps you and I can easily distinguish the subtle difference between 'Musicians always use chords' (obviously wrong) and 'Musicians always work, individually or together, within a key, which is an abstracted but well-defined set of tones that can be combined in time series or simultaneously to produce an inexplicably pleasant experience in the listener, by some neurological magic that has never been adequately explained' (non-obviously correct) but y'know what, I actually am willing to let little gems like that slide because they're adequate approximations of the truth that allow good folks to proceed on a journey that may one day lead them to, just maybe, have the arrogance required to belittle the uninitiated.