Dude you just completely dodged the issue. I never said he could 90; the only thing I said was that judging by your estimate of my marks, the example shows that you're severely underestimating what you need to get a certain ATAR. That's it.
I also try not to get into ATAR estimates, since I don't believe they're useful or reliable in the first place. My opinion is that it's a waste of time trying to predict it. If he gets it, then great, if not, then BL. Not gonna try predict and justify his ATAR, so the question of apologising to him is irrelevant since I'm not even giving a prediction in the first place.