It even has drug induced brainwashing and coercive sex slavery, and it sees its inner circles (and the sufficiently devout) as gods in the making. This is full Thetan tear lunacy, but because totemic magic words like "SCIENCE" and "LOGIC" are slapped all over the outer walls, it hasn't gotten the same scrutiny.
I think the translation is something like this:
"While it's important to ground yourself with others' perspectives and the lessons they've learned, sometimes conventional wisdom is based on what works for the majority, and it might not work if you as an individual are different, which is something you sometimes have to judge for yourself."
This is specifically in the context of realizing that she's trans. Cis people, which is to say, most people, can simply dismiss the possibility that they are trans as a silly thought experiment and move on with their lives, so she internalized that perspective and believed that the idea of herself being trans was silly and irrational, but then found that that didn't work for her and made her miserable.
Basically just trying a new approach or looking at something a different way, in a psychological context.
I think she was trying to determine what the most "rational" thing to study was, based on stuff like salary statistics and demand, without thinking about what she wanted - an approach that she recognizes as flawed, calling it, "outside view disease," aka considering only other people's perspectives.