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.
Its ok to trust your data to an advertising company because it just happens to sell a hardware device, but its not ok to trust your data to advertising company if they don't sell hardware devices?
The only real comparator here is Google, who have similar information available to them on Android.