What's the point?

[JugglingReferee]

It certifies that you are blind. (I Am A Blind Official.)

No seriously... I think some local boards put some weight into the training necessary to achieve the certification.

For example, here in parts of Canada, we are told that you need to pass a floor test and be evaluated at certain levels of games, doing at least a sufficient job to "pass" the IAABO certification.