I feel like you have this idea that technically literate people are magically immune from normal human foibles and think through the entire logical chain of consequences for every abstract fact of which they are aware. We are not.

Understanding how Google Music works and knowing that Google tracks information about you does not necessarily imply the very real understanding that viewing pages like this provide. People generally don't logic that way, us included.

I think it's a little more shocking when you see ALL this activity collated in one place by a single entity. It's not quite as impactful (and scary) if it had been Spotify or Apple Music with the music tracking, because that means our so-called digital profile is scattered across largely independent entities and so, no one entity has absolute information about us.