Have you noticed that there's no actual restriction that states, "We cannot enter this particular duty finder without a job class." As long as you meet the iLvl requirement, the matchmaker's all like, "Hi, Sugar Candy. C'mon in." So why do we all enter the duty finder on a job class anyways? Why is this unspoken rule the one with the most followers? There might be some understandable hostility if you're trying to pull this taboo in T5 or Levi Ex, but the duty roulette is simple enough.

Don't just ask yourself. Ask the person inside yourself. Your inner subconscious. The one that determines the universal truths of your galaxy. Why do I (you) play a job class when it is not necessary?