I read your post twice but I'm not sure which specific part of my post is in disagreement with yours.
To simplify my points, 1) there's a cap (based on my reading of other people in the main forums) but I don't know the actual number, and 2) I think you misunderstand, I don't believe seats have maintenance. It's okay to slightly overbuild and have 1 or 2 or 10 empty seats. I'd rather have that than have the demand for 10,001 seats and only have 10,000 available.
Personally, you should always aim for 100% attendance, but have your prices set so that you are maximizing attendance revenue..which usually means in a section or two you will fall just a tad short of 100%.
Here's where I disagree. I think you should build your arena slightly just above demand. Once you hit the cap, start tweaking the prices higher. Stop tweaking when you reached the max revenue you mentioned.
Also, Pop doesn't know everything and makes stupid mistakes sometimes too. We all know he should've had Tim Duncan in to rebound for that last minute Game 6 2014 Finals. Also, fuck Ray Allen.