Just so you know, Captain Bill was stark raving mad. A lunatic.
While he was in the Sea Org, he was abusive, terrorizing staff. Then he got extra weird when he married some young woman who was more than a bit dizzy, herself. As the stories go, any little thing she wanted, he would do for her, and that included RPFing anyone that offended her for any reason. Captain Bill was a terror and she loved giving him excuses to abuse others. Other exSO veteran survivors here have specifics. When Captain Bill was declared SP, there was cheering in the SO - people were relieved to see him go. He was a jerk.
In all honesty, I can't see how anyone could be better for doing anything related to Scientology, whether it's Captain Bill's uber sci-fi version or any other, it's all an exercise in the imagination claiming what you imagine is real and a vicious mindf&*k sugarcoated to be good for you. If it were touted as imagination exercises, maybe some of it could be useful to creative writers or similar, but since it makes false claims instead, it undermines a person's sense of reality and that is a very bad thing.
Some of the people who were followers of Capt Bill that I met afterward spent many years adjusting to real life afterward. Some never did.
At least you didn't have the cult atmosphere around it. Most people apparently did the spaceman's trip in imagination online.