I think getting questions from a third party exam bank to write your tests should be just as frowned upon as getting answers from the same bank to complete them

I think getting questions from a third party exam bank to write your tests should be just as frowned upon as getting answers from the same bank to complete them. Am I being unrealistic to think that, if this guy's been teaching a course that hasn't changed over the last 5 years, he should be able to write a new midterm each semester?