G.♣.
I have no idea, but ...
One thing you might consider doing is go back to the orthodontist that suggested getting 4 molars removed. Tell him/her what the university said and get feedback on the his/her original advise compared to the university's suggestion.
I honestly might go back and forth between the 2 asking questions. Make both of them explain why their opinion is the right one and why the other is wrong ... or, to put it nicer, make them explain the advantages and disadvantages of both suggestions.
When I was 12 (more than 30 years ago) I was told I had overcrowding and had 4 bicuspids removed as well as my 2 remaining baby teeth. The reasoning at the time was that bicuspids were the least important teeth and that I would still have 4 left. I believe that that is outdated thinking and no longer recommended. So really, what do I know!?!