I think your supervisor is misinformed. To say that this is the industry standard is simply false. Paper space was designed specifically for printing and if they are not using it for that then they are missing out on all the benefits. Printing from Model space is how we used to do things in the old days, (before R11), when Paper space didn't exist. Maybe your supervisor just never learned how to use it?
Perhaps your supervisor should join the forum. Maybe he will learn a few things.