I also prefer Spotify user-run playlists better, which I pick myself, searching for genres and songs explicitly.
Nothing to do with preferring the personalization.
"No" seems to suggest that you're disagreeing with your parent's post, but your parent is saying why they chose it, not why you did:
> I assume, perhaps incorrectly, that everyone has the same catalog (at least for my fairly boring taste in music) and actively choose Spotify’s personalization over Apple Music’s tighter integration with my phone, car, etc. Just a single data point though.
And I am saying why I chose it. You don't need to read too much into the "no", nor have to find some perfect formal consistency in a quick response. It's just "no" as in, "no, that's not my case".