The advent of the internet has increased the possibility for communication between such enthusiasts throughout the world but has also made for a rash of self-appointed heraldic "experts" who don't wish to engage in any scholarly pursuit of the heraldic arts and sciences and, either accidentally or purposefully seek to limit the possibilities for heraldic display accusing anyone who deviates from their own preconceived notions as guilty of self aggrandizement.
I don't think Fr Selvester is pointing the finger at anyone in the IAAH, though I may be wrong. For myself, my "preconceived notions" of heraldry are that modern practitioners should endeavour to maintain and enhance the art and science that we have inherited, avoiding breaks with tradition unless they are unavoidable. Thus in the case of Archbishop Fisher the assumption of four different coats of arms in the space of 11 years drove a coach and horses through heraldic tradition. The archbishop was and is fully entitled to impale his arms with those of his various appointments, but those who advised him that he might discard and/or change his personal arms as a whim were doing neither him nor heraldry a service.