Credentials are just that credentials and nothing more. If I may make an analogy to dog breeding. It is not that difficult for a backyard breeder to get papers from the AKC. They are a well respected organization and papers are just credentials. It does not mean that breeder is doing anything to better the breed at all. It just legitimizes the lineage. You can still have poor breeding and health issues with papers. An instructor can have impeccable credentials and still at the end of the day they are still a poor instructor. The students will suffer as would aikido as a whole just like a particular breed will suffer at the hands of a backyard breeder. You as a student have the right to the best aikido instruction you can get.