Apple argues that’s what they do, too. I haven’t delved deep into that, but think that, technically, they’re right.
Now question is whether Apple’s “whatever data they have on their logged-in users” is on equal footing with what the other big players have. Many iOS users are permanently logged into Apple (¿maybe not even when using a browser?). I guess many also are almost permanently logged into Facebook or Google.
The only real comparator here is Google, who have similar information available to them on Android.