Why does the CBR add extra questions to the theory exam

The CBR writes the text above about the 2 test questions in the theory exam.

Since March 1, 2019, the CBR has been using the 2 test questions for more than six years. According to the CBR, they conduct approximately 800,000 theory exams per year.

Then, let’s do some calculations. 800,000 times 2 test questions is 1,600,000 test questions, or 1.6 million.

More than 6 years is 1,600,000 x 6 = 9,600,000.

You can tell me a lot, but not that the CBR has already generated more than 10 million new questions.

The only real reason for the test questions is, in my opinion, the following. Someone taking a theory exam expects 50 questions in the exam. Then suddenly they see at the CBR that there are 52 questions. If you don’t expect there to be 52 questions, you’ll get extra nervous. Being extra nervous means being more confused, restless, and more likely to fail. Bingo for the CBR.

In any case, no one knows whether a question has been around for years, a few months, or is brand new. That’s why the CBR doesn’t have to add any test questions at all. In their administration, they can indicate whether a question is new or not.

If you know this, what would you call this mentality of the CBR?