I've always balked at the notion that coach's shouldn't pitch academics when recruiting a likely one-and-done. Even if students are only around for two semesters, isn't a possibility that they want to get as much as they can academically out of the time period? I don't mean that in reference to any specific school, I just really like the idea that K pitches Duke academics to all potential players.
(1) As much as we talk about OADs, reality is that, in any given class, there are probably only a handful of kids who are truly locks to be OAD from the day they set foot on campus. For most, NBA draft projections can fluctuate wildly during a season and many highly-ranked freshmen may find themselves in a position where it makes sense to stay for longer than 1 yr. Just look around college basketball this year. If you look at the top 20 players in the 247 rankings from last year, I believe only 7 are likely to leave -- and frankly a pretty valid argument can be made that at least 2 of that 7 are leaving despite seeing their stock take unexpectedly large tumbles (Labissiere and Diallo). For all but the elite of the elite, the smart move is to pick a school you feel comfortable attending for multiple seasons --- even if the hope / dream is to leave after one.
(2) For even the elite of the elite, I think the academic angle still has some saliency b/c it can be spun as a quasi-insurance policy against a catastrophic injury + a good way to start building a network of business contacts (e.g., through current students who will go on to have important roles in business + with Duke alums).
The only reason Cal is complaining about the academics / business side of the Duke sales pitch is because (i) it does matter to some potential OAD kids, and (ii) that's an important part of the Duke sales pitch that he really can't counter. This is really no different than Cal shedding crocodile tears over Coach K's involvement with Team USA.