Slowrotor,
You write:
<I cannot attend the safety course without a heli pilot certificate. That doesn't make much sense to me.>
I can assure you that it makes a lot of sense to the vast majority of people who attend the course and to the Robinson company who produce it.
Listen to your instructors who have attended the course, and learn. After around 150 hours on the Robinson type, go on the pilgrimage to Torrance. Your time will be wasted if you go before you can sensibly answer the questions that may be posed.
I went at 120 hours R22 time and only just managed to avoid looking inadequate. Then again I have been flying planks for 40 years.