This statement is laughable and quite frankly it warrants a response from someone who tutored 4 subject instances during my degree.
Well, I've never taught anything at uni. Buuuut...
It doesn't seem like too remote a possibility that some tutors would mark the exams they've been given on a question by question basis, rather than marking an exam in full before moving onto the next one. That seems like an approach a lot of tutors would adopt, and certainly one I've heard described to me before. That way they'd have no ability to consult your master lists without wasting a lot of time.
It also seems like a big assumption on your part that the exam marking protocol is uniform between LTU IT and Monash Arts.
It also seems like a waste of time on the tutor's part when they need to mark and re-mark 100+ essays to check your name (one of potentially 10s of students you've taught that sem) against an attendance list, go "oh, this student passed the hurdle attendance requirement but still missed two tutes", and then adjust their marking style in order to penalise them harder than the students with better attendance rates.
It really just sounds like bullshit an older student might tell a jaffy to scare them into being vigilant on the attendance front.
Is it ethical? No. Are tutors human? Yes, and it is crucial to understand the real world isn't as ethical as it seems.
Oh, spare me.