Shawn Kemp wasn't a big man either, not really. Not as an interior focus. Shawn Kemp was an elite, as Karl likes to say "rim runner". That's where the bulk of his points came from. Hardly a surprise that Karl wanted Cousins to do the same thing.
And yes, lack of experience combine with world class stubborness absolutely can render you clueless. George Karl turned into an old idealogue in his old age, determined that his legacy was going to be playing a certain way, which was different from the old way, and the father of the modern way. He didn't even want an interior big man as an offensive focus. Never had one before. Just in the way now.
If Kemp wasn't a big man, what was he, a PG? He wasn't a prototypical low post player, but he was a big man.
Regardless Boogie is going to be out by the free throw line this year a lot. Or so it seems, let's wait and see. Personally I will love it if it happens, as I have said repeatedly Boogie is at his best in the middle of the floor with a live dribble. I would expect you would have a problem and philosophical difference with this based on what you have said and projected when Joerger was hired.
I anticipate this: Boogie is going to get his touches out of the post but they will come selectively in transition when he can pin a little guy and has clear size advantage on the man guarding him. Otherwise, we are going to keep the basket area open to allow for cutters and back doors. This is NOT a lot different than the Karl system. The difference is we are going to have more player movement and we are changing our point of attack from PG-initiated (pound, pound, pound, pass) to PF-initiated.
And instead of three players on the court being an afterthought in play sets, everyone is going to have more opportunity to score, with the strong side having three guys, instead of two man ball with three out. The difference between Karl and Joerger will be a matter of structure and inclusion and not predominantly where Boogie positions himself in half court sets. Boogie spent a ton of time at the top of the key (not behind the three line) last year setting pick, and rolling. I know because I saw every game! There will be less freedom for Boogie to break plays and more options for him to find teammates, give up the ball and get it back.
This will hopefully reduce Boogie's usage and help to boost his scoring and passing efficiency (over 55% TS and 1.0 or better assist to turnover). These are the difference fans should expect to see, and those I expect, not the vague references you have made to ground and pound smash mouth basketball with Boogie getting 10-12 touches out of the low post. By early accounts, it is not going happen.