Look - if you abuse the privilege of being NT manager, you can certainly get a small benefit. But you won't get elected again. This isn't a systemic problem, and definitely not a problem with managers like rwystyrk, or any others that you're considering knocking accomplishments from because they were NT managers. I know it's not easier to win D1 titles as NT manager because if it was, NT elections would be flooded with D1 candidates. And they're not.
I'm not gonna go over every point. Everybody can read what I wrote and your rebuttal and can form his/her opinion. I don't think A is widespread, B is a concern and C is a real issue, because a NT manager can impose builds on managers (linked to point A) and should have a conversation going with the managers about both training and GS. Point C has happened and people mentioned it openly on the forums so it's not an hypotetical issue.
I'm not judging anybody nor knocking down anybody, but perhaps we shall ask NBBA managers if they'd feel comfortable with someone competing for the title and being the NT at the same time. We could do the same exercise with the ipercompetitive Polish D1 guys what they think now that one won the election (and another came in second).
All I'm saying is that being the NT manager gives you an advantage over the competition. Large or small (are you're now trying to make it look like) it is still an advantage and it is not nonexistant (as you tryed to imply before, if I understood you correctly)