There is also something to be said in this discussion for the direction of the sport. Pick and roll offenses are simply more effective which means it is optimal to use centers for screening and floor spacing. There are plenty of offenses that still function through the post (see Gonzaga, UNC, etc.), but all things being equal you're putting the ball in the hands of your all-American point guard over your all-American center and once Bamba to UConn is finalized Jalen is still going to be the man.
So I don't buy your argument because it isn't like the situations at Duke and Kentucky are so different - if this was about maximizing his post touches, he'd go to Georgetown or something. This is about the next level and scouts care way more about his athletic profile than his refined skills. Most of the best centers in the NBA today - Jordan, Gobert, Drummond - receive nothing more than the courtesy post touch here or there and they are all worth nine figures. Meanwhile, Diamond Stone goes 40th overall.
And for what it's worth, there is nothing to suggest we are unwilling to feed the post. Brimah was being force fed touches until he gasped his final breath in a Husky uniform and Miller touched the ball plenty the season prior.
I do understand though that when these misconceptions exist within a message board of die-hard fans then they very likely exist in the minds of recruits, which is too bad. But that's what the coaches are paid to do and that's why Chill was brought in (not for this recruitment specifically, but to change the PR a bit).