Expecting the transfer recruiting to stay where it was is dumb. Transfer recruiting has completely changed, and anyone trying to say the blue bloods have always been recruiting transfers is being willfully ignorant. It is no longer faux pas to recruit transfers, and while the pool is larger now, the quality is about the same. There are a handful of Kane-like guys, and they aren't going to Iowa State. They're going to Kansas, Duke, Louisville, and Michigan State. Hoiberg found a cheat code, and it worked. But that's gone.
This has very little to do with Prohm's recruiting tactics although I agree they aren't a great match for transfer recruiting. Transfer recruiting IS harder, especially when the top recruiter of transfers is in your conference. That's not a fallacy and to suggest otherwise is ridiculous. Bill Self was not going after high-level, questionable-character transfers in 2012. Now he can't get enough.