I always thought the ratings were a bunch of baloney. For example: my last game (6154862) I scored 76% of my points from the guard position (granted some were dunks and inside shots) and shot 51% combined between the guards (35% from 3) and still had a higher rating in Inside Scoring. I guess if it only measures players skills and not stats it would make a little more sense because I am slightly weighted towards inside scoring. I also am 90% sure my opponent has very good inside defense which could explain some of the disparity between inside scoring skill and inside scoring stats.
Anyways, that was my ramble, don't put too much stock in the ratings in my opinion stats are king.
I see nothing wrong with the interpretation of ratings for this game. What you don't take into account is that the other team had a much higher rating in inside defense. Both teams take part in the game, you know ;)
"I don't know half of you half as well as I should like; and I like less than half of you half as well as you deserve."