I'm not sure where you got that information from but when I took (a long time ago) and my daughter took her class (a year ago), you listened to the instructor for a couple hours or so go over safety along with the rules & regulations pertaining to CWP. In our cases the instructors were LEO's so they also gave us insight on how members of law enforcement preferred to handle a situation where they were interacting with a person with a CWP. Overall the instruction level was pretty good.
Anyhow, there was no written test/exam but there was a firearm proficiency test to make sure that the person knew how to safely handle a firearm and engage a target. In my class we used a Ruger .22 revolver and in my daughter's class they used S&W .22 semi-auto pistol. If I remember correctly, the target was 7 yards away and you had to get "X" many rounds in the target and you had 10 rounds to do it. My first 3 shots were in the center and the instructor told me that was good enough..... My daughter had a similar experience. Unfortunately, there were some students that looked like it was their first time with a handgun. To the credit of our instructors, they told those students they needed more time behind the firearm before they could get their certification and to go home, practice and retake the class with no additional fees. I'm afraid there may be some instructors out there that may have looked the other way and gave them a certificate.