Its still subjective, you've spent 40 years training your taste buds to accept that as "quality." At the end of the day, some people dont appreciate things that others do.
I agree that a persons point of reference and experience will affect their judgement, but its still much too subjective, the "help" you get along your jouney will also "cloud" your subjective judgement, just like that test that showed many of the younger generation prefer lower bitrate mp3.