Earlier quoted context omitted.
Sure they do. What if they switch accounts, usernames, phones, etc. More data is better.
This argument’s logical error is presenting unprovable beliefs as if they were facts. Apple may or may not care if users switch accounts. Only Apple confidential knowledge can prove or disprove this argument with certainty. In the absence of certainty, a best-faith effort must be made to determine whether their actions support or contradict these assertions. The claim “Sure they do” is unsupported both by available e…
The person you are replying to was merely offering an example to contradict a blanket statement without a factual basis, essentially that Apple does not track users because the user is already logged in. The respondent presented a situation in which that reason would not apply.
Also, your way of engaging people in this way is annoying -- specifically starting every reply with 'This argument’s logical error' and then coming up with a seems-right-at-a-glance breakdown of their argument's faults. Are you doing it on purpose to annoy people?