That is called a stereotype not a prototype.
No I don't work for the USTA. My point is that the debate about whether degrees/diplomas/certificates mean anything has raged for centuries, with no resolution. Other than in matters of public safety, there should be a trade-off between requiring some skills and imposing high costs and bureaucracy and stifling creative people. To me, a written exam combined with an actual lesson and play demonstration is a very reasonable compromise for a relatively safe recreational sport like tennis.