You’re surely correct that some people have “tin ears”, and will never hear music like, say, I do. That’s a given.
But my stubbornly-held contention [SpudGunner? Stubborn? Say WHAT?] is that the (glaring?) deficiencies in the MyMusic program aren’t due to perceptual differences in the non-tin-ear population, nor did Oticon make that program “suck” for the rest of us for their benefit.