Is there anything about notes and instruments tuning that is not arbitrary? But hear me out: there's few hundred years tradition behind it, at least in the west, so why not follow it for a kid?
"I assume that if the learner drifts later in life by under a semitone, then things will seem like they're between keys." - problem that never occurred to anyone with a perfect or just good pitch.
"I assume that if the learner drifts later in life by under a semitone, then things will seem like they're between keys." - problem that never occurred to anyone with a perfect or just good pitch.