There is a quote that L. Ron Hubbard wrote which is:
"All things are complex when they are poorly understood." - L. Ron Hubbard.
To me, this quote is applicable to everything, be it work, games, or Scientology. If you really want to know about what Scientology is, and it seems complex or mysterious, get a book written by Mr. Hubbard that explains it. Some such books are "What is Scientology?" or "Dianetics - The Modern Science of Mental Health" or "Scientology: The Fundamentals of Thought". If Scientology seems complicated to you, check these books out so you can get a better understanding of what it's all about.