Don't think they are all too worried about a deflated ranking when they've ranked 1st for 25 years straightThey don't have business and legal iirc
its kinda the opposite though lol
they only offer 'harder' better scaling subjects so everyone gets better atars but theoretically less band 6s --> this actually deflates the ranking
whereas a private school will encourage easier subjects so a higher proportion of band 6s but lower atars --> inflated ranking
And speaking of ruse, I'll just leave this here...