The court has plenty of people capable of gauging the expertise of the witness, just not at that level. Impeaching credibility is not the job of the court - it

The court has plenty of people capable of gauging the expertise of the witness, just not at that level. Impeaching credibility is not the job of the court - it is the job of the opposing party. If the other side of the case had an expert that didn't bring up the lack of credentials, or the litigators on the file didn't bother to do the most cursory of credibility impeachments, that's on them.