In reality, both points of view are entirely understandable. KJ clearly thinks that transferring to a higher profile conference will improve his career opportunities. He has graduated and is well within his rights to make such a move.
I won't happily cheer for him, however, in his new landing spot. KJ may feel that the move is best for him, and if so, is entitled to transfer. It is a slap in the face, however, to the school that has developed and educated him for the past four years. The covenant between school and player should be of mutual benefit. KJ was clearly not prepared to contribute as a freshman. The best move, for program and player, was to redshirt: Osborn maintains eligibility, learns the game, and grows stronger. It also ensures a fifth year of tuition free undergraduate or graduate education which is of lifelong benefit. UB earns a fifth year experienced player better ready to contribute down the line. In transferring for his senior season KJ still pockets his benefits, while UB loses out entirely on their investment.
Miami and other P5 schools further have no cause to pause when recruiting away a ready made graduate transfer from their G5 brethren. The NCAA, in order to maintain some semblance of a level playing field, needs to address the situation. Some form of compensatory transfer of scholarship(s) from the recipient institution to the donor, so to speak, seems most fair. Miami wants a polished 5th year starter from Buffalo? Two scholarships transferred to Buffalo in exchange. If we are to serve as a farm system to the schools we are expected to compete against we ought to have the benefit of casting a wider net up front. In this manner, player movement remains free but a cost is extracted from the bigger institutions almost always on the receiving end of top talent from the Buffalo's of the world.
For the record, I am a physician. I graduated from UB undergrad and medical school. Within the medical world people are generally upset when someone leaves a practice to work at a perceived competitor. Onerous restrictive covenants are commonplace. My own contract has a two year non-compete for the region with a buyout well into the six figures. Want to move to a "better job?" Be prepared to have a pound of flesh extracted and expect hard feelings from the former partners who have aided your professional development.