Do Seventh-day Adventists worship a role-playing mystery?

"There is one God: Father, Son, and Holy Spirit, a unity of three coeternal Persons." - Seventh-day Adventist Fundamental Belief #2, The Trinity

For more info about the dangers of Seventh-day Adventism:

The Mystery of Creation: The trinity, angels, unfallen worlds, aliens
https://www.youtube.com/watch?v=T-Hgk-3TwVw&t=12s

The Hidden Hand of Seventh-day Adventism
https://www.youtube.com/watch?v=vxwMXbdLxOM&t=6s

Dr Allen Davis: Leaving Adventism w/ Robert Motsinger
https://www.youtube.com/watch?v=RtIi8Fyq2Lw&t=5s